White Butterfly Discus: Complete Care Guide for Symphysodon aequifasciatus

What is a White Butterfly Discus?

White Butterfly Discus is a captive-bred color strain of the blue discus Symphysodon aequifasciatus, selected over multiple generations for a near-solid cream or off-white body, faint vertical bars, and a soft butterfly-style fin profile. It is one of four widely recognized white-pattern discus strains alongside White Diamond, Pearl White, and Albino White, and it is most commonly produced by Stendker Diskuszucht in Germany and by US and Southeast Asian breeders working from Stendker bloodlines or independent white-line projects.

Taxonomically, every domestic discus strain traces back to one of three wild parent species in the genus Symphysodon: the blue discus S. aequifasciatus, the brown or red discus S. discus, and the green discus S. tarzoo (recognized as a separate species in the 2006 Ready et al. revision). Modern strain genetics are messy. Most commercial discus, including White Butterfly, are hybrids of S. aequifasciatus with introgression from S. discus and S. tarzoo across decades of intentional crossing. Stendker fish in particular are bred to a stable lineage with consistent body shape, color expression, and disease resistance, which is why a Stendker White Butterfly looks identical from clutch to clutch while a budget Southeast Asian import may vary noticeably between siblings.

The "butterfly" designation refers to fin shape and overall body silhouette: White Butterfly fish often show slightly more pronounced unpaired fins (dorsal and anal) than a White Diamond, giving the body an extended outline reminiscent of a butterfly when viewed from the side. The cream body color is partial leucism, not full albinism. The eye is dark (sometimes faintly red in some bloodlines but not the bright red of a true albino) and the skin retains light melanin patches, which is why faint vertical bars are visible under stress or excitement.

Discus first entered the international aquarium trade in the 1930s as wild-caught specimens from the Brazilian Amazon and its tributaries. Commercial line-breeding began in West Germany in the 1960s under Eduard Schmidt-Focke and accelerated through the 1970s and 1980s as Stendker, Schmidt-Focke, and later Asian breeders selected for color expression and parameter tolerance. White-line discus emerged in the 1990s, and the four named white strains diverged through the 2000s as breeders selected for specific traits within increasingly stable lineages.

How do I identify a White Butterfly vs other white discus strains?

White Butterfly has a cream to off-white body with faint vertical bars visible under stress, a dark or amber eye, and slightly extended unpaired fins. White Diamond has a uniform metallic platinum-white body with no bars and a red or amber eye. Pearl White shows pearl-like reticulation across the body and is closer to a uniform pearl-white than a clean white. Albino White is true albino with no melanin anywhere, fully red eyes, translucent skin, and is the most fragile of the four. Mis-identification at point of sale is common because vendor lighting heavily affects how a white discus reads, so always ask for a video of the fish under warm white light.

Side-by-side identification table

What to look for in person or in video

• The eye. A White Butterfly should have a dark or amber pupil under normal light. Bright red eyes indicate albinism, which is a separate strain and a separate husbandry challenge.
• Bar visibility under stress. Catch the fish briefly in a net or photograph it during a feeding excitement event. White Butterfly will flash light vertical bars that fade within minutes. White Diamond will not.
• Fin profile. Look at the fish from the side. White Butterfly should have slightly elongated, gently rounded dorsal and anal fins. White Diamond fins are typically more compressed and round.
• Body shape. Adult discus body shape varies more by bloodline than by named strain, but Stendker-line White Butterfly tends to a slightly oval (not perfectly round) profile compared to high-bodied competition-grade Asian fish.
• Skin texture under macro. Modern phone cameras can capture surface texture. A White Diamond shows a smooth metallic sheen across the whole body; a White Butterfly may show slightly mottled texture in the bar zones.

Why mis-identification matters

The four white strains have similar care requirements at the broad level but diverge in lighting tolerance, color stability under poor parameters, and price. Paying White Diamond money for a White Butterfly is a 100 to 200 dollar mistake per fish. Paying Albino White money for any of the others is rarer but the reverse mistake is dangerous - keeping an Albino White under reef-grade LED PAR for a few months will damage the iris and reduce lifespan, and most photo-based listings are too low-resolution to confirm a true albino without a request for a fresh video.

Where does White Butterfly Discus come from?

White Butterfly Discus is a captive-bred color strain with no wild equivalent. The strain emerged from European line-breeding programs in the 1990s and 2000s, with Stendker Diskuszucht (Bergheim, Germany) producing the most widely distributed bloodline. Southeast Asian breeders, particularly in Malaysia (Forrest Discus) and Penang, produce alternative lineages, often crossing in different selection traits. US breeders import Stendker juveniles and grow them out, or work from US-isolated breeding stock.

The Stendker lineage

Stendker Diskuszucht has been breeding discus since 1958 and is widely considered the gold standard for European captive-bred discus. Stendker fish are raised on a single, highly-engineered diet, in highly-engineered water (closer to Bergheim tap than to soft Amazon water), which means Stendker discus arrive pre-adapted to harder water than most discus literature recommends. A Stendker White Butterfly can be kept and even bred in GH up to 10 dGH, although softer water is still preferred for spawning and pH stability. The famous "Stendker hardiness" comes from this multi-generation adaptation to tap-water-grade parameters.

Stendker fish are visually identified by the small Stendker ear-tag-style health certificate that accompanies imports through the official European and US distribution chain. In the US, Wattley Discus (Florida) is the primary Stendker importer, and most Stendker-tagged White Butterfly that arrive at hobbyist tanks have passed through Wattley first.

The Forrest Discus lineage

Forrest Discus, based in Penang Malaysia, is one of the largest Southeast Asian captive-breeders and one of the few that publishes consistent strain documentation. Forrest White Butterfly tends to a slightly cooler, whiter body than Stendker (less cream, more pure white) and is typically grown on a Tetra-style diet plus beefheart. Forrest fish ship through Singapore or Hong Kong to US distributors and arrive a bit smaller than Stendker imports of the same age.

US breeders working from Stendker stock

Several US breeders maintain White Butterfly lines isolated from Stendker imports going back 5 to 10 generations. These fish ship cheaper (no transatlantic flight), are pre-adapted to US tap-water chemistry in the breeder's region, but show more variance from clutch to clutch than directly-imported Stendker fish. Quality varies widely by breeder.

What tank size does a White Butterfly Discus need?

A 75-gallon tank (48 x 18 x 21) is the minimum for a group of six juvenile White Butterfly Discus. A 90 to 125 gallon tank (60 x 18 x 21 or 72 x 18 x 21) is recommended for a group of six to eight adults. Single discus or pairs of two should not be attempted - discus are obligate shoaling fish and a singleton becomes a stress sponge. A group of six dilutes any intra-group aggression and lets sub-dominant fish escape pressure by switching positions within the school.

Why six is the magic number

Discus form a hierarchical school in which one fish dominates the feeding zone, two to three sub-dominants share secondary positions, and the remainder occupy the third tier. A group of three has only one dominant and two targets, so the bottom fish gets picked on continuously. A group of six gives the dominant fish too many subordinates to focus on, and the social pressure disperses. Groups of eight or ten work even better in larger tanks. Trios sometimes work if all three are the same size and a pair has not yet bonded, but the failure mode (one fish hiding in a corner not eating) shows up within 30 days.

Tank shape recommendations

• 75-gallon long (48 x 18 x 21). Minimum for six juveniles to 4 inches. Will need an upgrade as adults reach 6+ inches.
• 90-gallon (48 x 18 x 24). Better depth for adult body height. Six adults fit comfortably.
• 125-gallon (72 x 18 x 21). The sweet spot for a discus display - room for 8 adults plus dither fish, easier to maintain stable parameters, and enough floor space for breeding pair formation.
• 180-gallon+ (72 x 24 x 25). Show tanks. 10+ adult discus with full plant scape.

Discus need vertical depth (height) more than length because of their body shape - a tall tank lets them swim naturally up and down the water column. A 40-gallon long (48 x 13 x 16) is a bad discus tank despite the 48-inch length because it lacks the vertical room. A 40-breeder (36 x 18 x 17) is borderline for a grow-out tank but will not work for adults.

What water parameters does White Butterfly Discus need?

Target pH 5.5 to 6.5, GH 0 to 3 dGH, KH 1 to 3 dKH, TDS under 150 ppm for breeding and under 250 ppm for grow-out, temperature 84 to 86 F. Ammonia and nitrite both at zero, nitrate under 10 ppm. White-pigment strains are particularly nitrate-sensitive: chronic nitrate above 20 ppm causes fading of the cream tones to a dull gray and contributes to head-and-lateral-line erosion (HLLE) over months. Stendker-line White Butterfly tolerates harder water (up to GH 10) but soft water is still preferred for color expression and breeding.

Why 84 to 86 F

Discus evolved in warm, slow-moving Amazon tributaries where summer water temperatures reach 86 to 88 F. The 84 to 86 F range is the modern standard for two reasons. First, immune function and digestion in Symphysodon peak above 82 F - cooler water slows metabolism and increases susceptibility to gill flukes and Spironucleus. Second, high temperature accelerates parasite life cycles, which sounds bad but is actually useful for diagnosis and treatment - parasites cannot hide in latent stages as easily. The downside is that warm water holds less dissolved oxygen, so a discus tank needs strong aeration and oversized biological filtration to compensate.

How to achieve soft acidic water

• RO/DI water. The standard approach. A 5-stage RO/DI unit (Bulk Reef Supply, SpectraPure) produces 0 TDS water that you remineralize for the target. Cost: 200 to 350 dollars upfront.
• Re-mineralize with Salty Shrimp Discus Salt or Seachem Equilibrium. Adds back the GH and KH needed for biological function without driving TDS too high. Aim for GH 2 dGH, KH 1 to 2 dKH.
• Indian almond leaves or oak leaf litter. Adds tannins that drop pH and provide mild antibacterial action. Visual effect: water tints amber, which photographs well for white discus.
• Peat moss in the filter. Same chemistry as almond leaves, more controlled. Use in a media bag and replace monthly.
• Driftwood. Long-term tannin source. Mopani driftwood releases more tannins than spider wood. A single piece in a 75 will lower pH 0.2 to 0.4 over weeks.

Stendker fish handle harder water than wild or Asian-bred discus, so if your tap is soft to moderate (under GH 8), a Stendker White Butterfly will live and breed without RO/DI. If your tap is hard (GH 10+), RO/DI is required for breeding and recommended for grow-out.

Test kits

• API Freshwater Master Test Kit for ammonia, nitrite, nitrate, pH. Adequate baseline.
• Salifert pH Profi-Test for accurate low-pH readings (under 6.5 the API kit becomes imprecise).
• API GH/KH liquid test or Salifert Calcium/Magnesium for hardness components.
• HM Digital TDS-3 meter. Tracks dissolved solids in real time. Critical for RO/DI top-off accuracy.

What equipment does a White Butterfly Discus tank need?

Discus tanks need oversized biological filtration (10x display turnover), a high-quality heater rated for the tank volume plus 25 percent (a 150W minimum for a 75-gallon, 250W for a 90 to 125), gentle water movement (not the high-flow seen in reef tanks), a python water-change system (you will do 30 to 50 percent weekly changes), and a TDS meter for top-off and parameter tracking. Lighting is minimal because discus prefer dim conditions and white strains particularly so.

Filtration approach

Sponge filters and canister filters dominate discus husbandry. Sponge filters provide gentle flow and large biological surface area; running two sponge filters in a 75 is a standard breeding-tank approach. Canister filters (Fluval FX4, FX6, Eheim Pro 4) provide chemical and mechanical filtration in addition to biological, and are the better choice for planted display tanks. Hang-on-back filters generate too much flow at typical discus turnover rates and stress the fish. Sumps work for larger setups (125+ gallon) where the additional water volume aids parameter stability.

Equipment shopping list with 2026 pricing

Realistic startup cost for a 75-gallon White Butterfly setup: 1,000 to 1,800 dollars. For 125 gallon: 1,500 to 2,500 dollars.

What do White Butterfly Discus eat?

White Butterfly Discus are omnivores leaning carnivore. Feed a varied diet of high-quality discus pellets, color-enhancing flakes that emphasize spirulina and white-fish protein, frozen bloodworms (sparingly), frozen mysis shrimp, frozen brine shrimp, and beefheart-based homemade mixes. Feed 3 to 5 small meals per day for juveniles under 3 inches, and 2 to 3 meals daily for adults. Color foods for white strains should be low in red carotenoids (astaxanthin, capsanthin, paprika extract) which can tint white bodies pink or peach over time. Avoid live tubifex worms and feeder fish entirely - both are vectors for gill flukes and Spironucleus.

The color-feeding nuance

Standard discus color foods (Tetra Discus, Hikari Discus Bio-Gold) are formulated to enhance red, orange, and yellow pigments because most discus strains are selected for those colors. White strains do not benefit from carotenoid enhancement and can actively suffer from it - a pure White Butterfly fed Tetra Discus Color flakes for six months will often develop a faint pink or peach undertone on the dorsal area that owners then mistake for a "color deepening" and cannot remove. Choose color-neutral formulas instead: standard Stendker dry food, Hikari Discus Bio-Gold base (not the Color variant), or homemade beefheart-spirulina mix.

Foods to feed

Foods to avoid

Live tubifex worms carry capillaria and the gill fluke Dactylogyrus. Feeder goldfish or rosy reds carry Spironucleus and many additional parasites; never use them. Freeze-dried bloodworms are nutritionally inferior to frozen and lack the moisture content fish need. Any food product with paprika extract, marigold extract, or astaxanthin listed in the top five ingredients - all carotenoid-rich and will alter a White Butterfly's color over months.

Feeding schedule

• Juveniles under 3 inches. 4 to 5 small feedings per day. Crushed pellets, baby brine shrimp, finely-chopped frozen.
• Sub-adults 3 to 5 inches. 3 feedings per day. Standard pellets and frozen.
• Adults 5+ inches. 2 to 3 feedings per day.
• Breeding pairs. 4 feedings per day with heavy frozen rotation and vitamin supplements. Conditioning takes 4 to 6 weeks before consistent spawning.

Why do White Butterfly Discus need dim lighting?

White-pigment discus strains have reduced melanin in the iris and surface tissues, which makes their eyes more sensitive to high-intensity overhead light. Reef-grade PAR levels (above 80 PAR at substrate) common in modern planted-tank LED setups cause squinting, jumping, and over months can contribute to opaque-eye, cataract formation, and color fading. Keep PAR at the substrate under 50, prefer warm-white 6500K LED over actinic-heavy spectrum, and dim during the first 30 days post-acclimation. A floating plant cover (Amazon frogbit, dwarf water lettuce) blocks 30 to 50 percent of overhead light and is the simplest practical fix.

Practical lighting setup

• Bulb temperature. 6500K warm-daylight or 5000K natural-white. Avoid 10000K and above (too blue) and avoid actinic-heavy fixtures designed for reef tanks.
• PAR target. Under 50 PAR at substrate, ideally 25 to 40 PAR. Most NICREW ClassicLED and Hygger 24/7 LED fixtures hit this range at the lowest setting in a 21-inch tall tank.
• Photoperiod. 8 to 10 hours daily. Discus tolerate longer photoperiods if dim, but 12+ hours of bright light visibly stresses white strains.
• Floating plant cover. Amazon frogbit (Limnobium laevigatum) or dwarf water lettuce (Pistia stratiotes) shade the column without limiting your aquascape options. They also export nitrate efficiently - useful for white strain husbandry.
• Ramp schedule. Use a programmable LED with a 30-minute sunrise and 30-minute sunset ramp. Sudden lights-on causes white discus to flash and bang into the glass; gradual ramping prevents this entirely.

What to do if you already have a high-PAR setup

Many keepers buy white discus to retrofit into an existing planted tank with full-spectrum lighting designed for high-light demanding plants. The retrofit options are: dim the fixture to 40 to 50 percent intensity, raise the fixture 4 to 6 inches above its current mount, add a floating plant cover that achieves 40 percent canopy coverage within 60 days, or change bulb temperature from a planted-tank 7500K spectrum to a 6500K warm-white. Most keepers combine the floating cover with a fixture height raise and get the PAR under control in two weeks.

Which fish are compatible with White Butterfly Discus?

Compatible tankmates for White Butterfly Discus include peaceful South American species that tolerate the same warm acidic soft water. Best matches are cardinal tetras, rummynose tetras, sterbai corydoras (the only cory that tolerates 84 to 86 F), Apistogramma (one species per tank), German blue rams, and Otocinclus. Avoid most cichlids (angelfish included, despite the common pairing recommendation), large barbs (nip discus fins), goldfish, fancy guppies, and any fish that prefers temperatures under 80 F. Discus do best in a species-only group of six or in a community structured around them.

Best tankmates

Tankmates to avoid

• Angelfish. Despite the common pairing, angels are pterophyllum-class cichlids and they out-compete discus for food, then pick at discus mucus during slime-feeding fry season. Skip them.
• Bristlenose pleco, common pleco. Plecos rasp on discus during sleep, especially during slime-feeding. Otocinclus replaces them in a discus tank.
• Tiger barbs, denison barbs, most barbs. Fin nippers. Discus have flowing unpaired fins that get shredded.
• Most non-Sterbai corydoras (bronze, panda, julii). They cannot tolerate 84+ F long-term and develop kidney damage and shortened lifespan.
• Livebearers (mollies, swordtails, platies). Need hard alkaline water and cooler temperatures.
• Loaches (clown, kuhli at high temp). Most are temperate-water fish that suffer at discus temperatures.
• Fast-swimming fish (danios, white cloud mountain minnows). Stress slow-moving discus by darting near them at feeding.

How do White Butterfly Discus breed?

White Butterfly Discus pair-bond from a group of six or more raised together from juvenile, then spawn on a vertical surface (a slate, ceramic spawning cone, or filter intake pipe) at 84 to 86 F in soft acidic water (pH 5.8 to 6.2, GH under 3, TDS under 150). The female lays 100 to 400 eggs in a tight column, the male fertilizes externally, and both parents fan and guard. Eggs hatch in approximately 60 hours. Free-swimming fry emerge day 4 to 5 and attach to the flanks of both parents to feed on parental skin slime (mucus) for the first 10 to 14 days. This slime-feeding behavior is unique to Symphysodon and a few related cichlids, and it is the part of discus breeding that no commercial fry food has yet replaced for first-week survival.

The full slate-spawn breeding protocol

1. Establish a group of six or eight juveniles. Raise together in a 75 to 125 gallon tank for 12 to 18 months until pair bonds form spontaneously. A bonded pair will defend a corner together, drive away other fish during feeding, and clean a vertical surface obsessively.
2. Move the pair to a dedicated breeding tank. 29-gallon or 40-gallon long, bare-bottom, sponge filter only, with a single ceramic spawning cone or slate at a 45 to 90 degree angle. Bare-bottom is essential - substrate harbors bacteria that destroy eggs during the vulnerable first 48 hours.
3. Condition the pair. Feed 4 times daily with frozen mysis, beefheart mix, and Selcon-soaked food for 3 to 4 weeks. Females will visibly fill with eggs and the genital papilla becomes more prominent in both fish.
4. Tune water for spawning. Lower pH to 5.8 to 6.2 via RO/DI + small amounts of remineralizer. TDS under 150 ppm. Temperature 86 F. The lower pH and TDS triggers spawning by mimicking the dry-season conditions in the Amazon.
5. Watch the spawning ritual. The pair shudders, the male flares fins, and both fish make 3 to 6 cleaning passes over the chosen surface for 2 to 4 days before egg-laying.
6. Spawning event. The female lays 100 to 400 eggs in a tight vertical column over 1 to 2 hours. The male immediately follows with fertilization passes. Both fish then position over the eggs and begin fanning.
7. Egg defense and fanning. 60 hours from egg-laying to hatch at 86 F. The parents take turns fanning and remove any white (fungused) eggs by mouth. First spawns from young pairs often see most or all eggs go fungal - this is normal, and most pairs improve dramatically by the third or fourth spawn.
8. Wriggler phase. Hatched fry hang from the spawning surface for 2 to 4 days, attached by a sticky head filament. Parents move them between surfaces by mouth.
9. Free-swimming and slime-feeding. Day 4 to 5 post-spawn, fry detach and swim to the parents, attaching to the flanks to feed on the parental mucus. Both parents secrete a thickened, nutrient-rich slime coat during this phase. Fry alternate between parents (one parent feeds while the other rests).
10. Supplemental feeding. From day 8 to 10, offer newly-hatched baby brine shrimp 4 to 6 times daily to supplement parental slime. Fry begin to take BBS at day 10 to 14.
11. Wean off parents. Day 14 to 21, fry spend less time on parents and more time eating BBS, then crushed Stendker food and finely-chopped frozen. Move parents back to community at day 21 to 28 or move fry to a grow-out tank.
12. Grow-out. Fry reach 1 inch at 8 to 10 weeks. Color development for white strains starts around 12 weeks; full color expression by 6 to 8 months. Many strain-true offspring are saleable at 2.5 inches, around 5 to 6 months post-hatch.

Common breeding failures

• White (fungused) eggs. Normal for young pairs. Persistent fungus in multiple spawns indicates a male issue (low fertility) or water quality issue (bacteria load too high in the breeding tank).
• Parents eating eggs. Usually stress from a new tank, tankmates that approach the spawn site, or low parameter stability. Solve by isolating the pair and lowering tank traffic during the first 72 hours.
• Fry not attaching to parents. If both parents have been raised slime-feeding (most Stendker stock has), this should happen. If the pair came from non-slime-feeding lines, fry may need full artificial rearing with infusoria and BBS from day 4.
• Slime-feeding refusal by parents. Some first-time parents do not produce the thickened slime. Subsequent spawns usually fix this. Artificial fry rearing has a 30 to 60 percent survival rate vs 90+ percent for parental rearing.

Which diseases hit White Butterfly Discus hardest?

The five diseases that cause most White Butterfly Discus deaths are gill flukes (Dactylogyrus), Spironucleus (often misdiagnosed as "hexamita" or hole-in-the-head), discus plague (a coronavirus complex affecting young discus), bacterial gill disease (Flavobacterium), and ammonia poisoning from under-cycled tanks. White-pigment strains additionally show higher rates of head-and-lateral-line erosion (HLLE) under poor parameters, and the pigment fading from sustained nitrate above 20 ppm is reversible if caught within weeks but permanent after months.

Gill flukes (Dactylogyrus)

Symptoms. Heavy breathing, gill flaring, flashing against rocks or driftwood, mucus-coated gills. Common in any new shipment, especially wild or Southeast Asian imports.

Treatment. Praziquantel at 2.5 mg/L for 7 days in the display or hospital tank. PraziPro is the common over-the-counter formulation. Repeat dosing at day 14 to catch any newly-hatched flukes. API General Cure (praziquantel + metronidazole) is an alternative.

Prevention. Quarantine every new discus for 30 days with prophylactic praziquantel and metronidazole on days 1, 14, and 28.

Spironucleus (commonly misdiagnosed as Hexamita)

Symptoms. White stringy feces, loss of appetite, weight loss with normal feeding offered, darkening of color, and in advanced stages, hole-in-the-head (HITH) lesions on the head and lateral line. Distinguish from Hexamita (Spironucleus salmonicida) is genuinely difficult and most "Hexamita" diagnoses in discus are actually S. vortens.

Treatment. Metronidazole (Flagyl) at 250 mg per 10 gallons every 24 hours for 7 days. Combine with raised temperature to 88 F during treatment. Re-treat at 14 days. Severe cases require oral dosing via medicated food.

Prevention. Vary diet, maintain water quality (nitrate under 10 ppm), avoid stress factors.

Discus plague

Symptoms. Sudden onset of darkening, clamped fins, heavy mucus production, loss of appetite, gasping at surface, often hitting an entire group within 24 to 48 hours. Affects young discus more than mature fish. Affected fish hide in corners and become unresponsive.

Treatment. No proven cure - discus plague is a coronavirus complex and treatment is supportive. Raise temperature to 92 F for 48 hours (heat-shock approach used by some Stendker importers), add Methylene blue or salt at 1 tablespoon per 10 gallons, and maintain pristine water. Mortality 30 to 70 percent depending on strain and tank conditions.

Prevention. The only reliable defense. Quarantine 30 days minimum. Source from breeders who quarantine before shipping.

Bacterial gill disease (Flavobacterium columnare and related)

Symptoms. White or grey patches on gills, frayed fins, mucus on gills, loss of equilibrium. Aggressive and fast-progressing in discus, especially at high temperature.

Treatment. Furan-2 or Kanaplex in a hospital tank for 7 to 10 days. Severe cases need injectable antibiotics from an aquatic vet (an option for valuable discus stock).

Prevention. Quarantine, stable water, low stocking density during quarantine, avoid temperature swings.

Head-and-lateral-line erosion (HLLE)

Symptoms. Pitting and erosion on the face and lateral line, progressing to white open lesions. White strains show HLLE more visibly than colored strains because the lesions stand out against the white body.

Cause. Multifactorial. Suspected contributors: vitamin C deficiency, nitrate above 20 ppm sustained, stray voltage in tank, Spironucleus, low-quality activated carbon.

Treatment. Improve water quality first. Add vitamin C supplementation to food. Treat for Spironucleus prophylactically (metronidazole course). Remove activated carbon for 30 days. Lesions heal in 4 to 8 weeks under improved conditions.

Where do I source captive-bred White Butterfly Discus?

Three sourcing tiers: imported Stendker (Germany) via Wattley Discus or other authorized US distributors (premium pricing, best quality), Asian breeders (Forrest Discus Malaysia, Penang breeders) via specialty importers (mid-tier pricing, variable quality), and US breeders working from Stendker or independent lineages (best value, regional adaptation, quality varies by breeder). Avoid pet store discus and chain-store discus - quality control on these is minimal and many fish are juvenile imports stressed by the supply chain.

Sourcing checklist

• Ask for live video. Reputable vendors will send a 2-minute video of the actual specimen. Look for active swimming, feeding response, clear eyes, no clamped fins.
• Ask about quarantine. A breeder that quarantines fish 14 to 30 days before shipping is dramatically less likely to send disease.
• Ask about parentage. Strain-true White Butterfly should come from White Butterfly x White Butterfly pairs. Crosses between strains produce variable offspring.
• Ask about size and age. 2.5 to 3 inches is the safest shipping size. Smaller fry ship badly; larger fish ship fine but cost more.
• Buy 6 minimum. A single discus from any source becomes a stress victim. Order 6 to 8 from the same source for proper shoaling and pair-bond opportunity.

Authorized Stendker distributors and reputable breeders

• Wattley Discus (Coconut Creek, Florida). Primary Stendker importer in the US. Most stable supply chain. Premium pricing.
• Hans Discus (Texas). Long-running US breeder, Stendker-line and independent stocks. Reliable quality.
• Kenny's Discus (California). Stendker imports, ships nationally. Premium pricing.
• Forrest Discus (Penang, Malaysia). Largest Asian breeder with consistent documentation. Sold through US importers.
• Discus Hans Gunther (Germany). Independent European breeder with strain-true lines.

How much does a White Butterfly Discus cost?

Captive-bred White Butterfly Discus runs 80 to 400 dollars per fish depending on source, size, and grade. A 2.5-inch US-bred juvenile is 80 to 150 dollars. A 3 to 4-inch Stendker import is 150 to 280 dollars. A 5 to 6-inch show-grade Stendker adult reaches 280 to 400 dollars. Asian-bred fish from Forrest and Penang breeders run 100 to 250 dollars depending on size. The cheapest "discus" listings on aggregator sites at 30 to 60 dollars are typically poorly-bred standard-color discus mis-labeled as White Butterfly.

2026 pricing reference

Total budget for a White Butterfly project

A realistic total for setting up a White Butterfly tank in 2026 with quality stock: 1,500 to 3,000 dollars all-in. That covers a 75 to 125 gallon tank, full filtration and heating, RO/DI water system, six 2.5 to 3-inch Stendker-line juveniles, food and supplements for the first year, and a backup heater. Show-quality projects with 5-inch Stendker adults run 2,500 to 5,000 dollars depending on tank size.

How to acclimate a new White Butterfly Discus

Drip-acclimate over 90 to 120 minutes. Discus are more sensitive to parameter swings than most freshwater fish because of the soft acidic water their physiology depends on. Float the shipping bag 15 minutes to match temperature, transfer fish + shipping water to a clean container, drip 2 to 3 drops per second from the destination tank into the container until the bag volume has tripled. Test TDS and pH at the end - within 10 percent of destination on both. Net transfer to a darkened quarantine tank. Lights off for 24 hours. No food for 48 hours.

Acclimation protocol step-by-step

1. Inspect on arrival. Open the box, photograph any DOAs immediately for vendor claim purposes. Check the temperature of the shipping bag - if it's under 70 F, contact the vendor before doing anything else.
2. Float the bag. Place the sealed bag in the destination tank water for 15 to 20 minutes to equalize temperature.
3. Transfer to acclimation container. A 2 to 5-gallon bucket or breeder net. Pour fish and shipping water in.
4. Start the drip. Airline tubing with a knot or drip valve. 2 to 3 drops per second from destination tank into container. Source water from the quarantine tank (always), not the display.
5. Drip 90 to 120 minutes. Volume should triple. Test TDS and pH at the midpoint and at the end.
6. Match parameters. Container should be within 10 percent TDS of quarantine tank and pH within 0.2 units. If not, drip another 30 minutes.
7. Net transfer. Use a soft fine-mesh net. Never pour shipping water into the quarantine tank - it carries fish stress hormones, ammonia, and potentially pathogens.
8. Darken the tank. Lights off for 24 hours. Floating cover or paper over the top half of the tank helps the fish find a refuge.
9. No food for 48 hours. A stressed discus does not feed and uneaten food fouls the water at the worst time.
10. First feed at hour 48. Small portion of frozen bloodworms or BBS. If the fish refuses, wait another 24 hours and try again.
11. Quarantine 30 days. Bare-bottom 20 to 40 gallon tank with sponge filter, prophylactic praziquantel + metronidazole on days 1, 14, 28.
12. Transfer to display. Match parameters between quarantine and display first. Drip the fish from quarantine to display the same way you dripped the original bag.

Common White Butterfly Discus mistakes

1. Buying one discus. The most common avoidable failure. Discus are obligate shoalers and a singleton stresses itself to death over months.
2. Skipping quarantine. White strains carry latent gill flukes and Spironucleus from most shipping channels. 30-day quarantine with prophylactic praziquantel and metronidazole prevents 80 percent of disease problems.
3. Feeding color-enhancement food meant for red strains. The carotenoids will tint the white body pink over months. Use color-neutral formulas.
4. Pairing with angelfish. Angels out-compete discus for food and rasp at fry-feeding parents. Skip them.
5. High-PAR reef lighting on a planted discus tank. White strains are particularly UV and intensity sensitive. Dim the fixture, raise it, or add floating cover.
6. Pet store cories. Bronze, panda, and julii cories cannot tolerate 84+ F. Use Sterbai cories only.
7. Tap water without conditioning. Chloramine destroys discus mucus on contact. Use a chloramine-grade water conditioner (Seachem Prime) for every water change.
8. Cooler temperatures to save heating costs. Discus immune function drops below 82 F and parasite susceptibility climbs.
9. Skipping water changes. White strains particularly need 30 to 50 percent weekly changes. Skipping causes nitrate creep, which fades the white body.
10. Buying from chain stores. Most chain-store discus are stressed Asian imports with no quarantine history. The savings vs a specialist breeder are erased by mortality and disease introduction.