Care guide, husbandry, breeding, disease, sourcing, and tankmate intelligence on Royal Pleco (L-191) - written by the Fast Aquatics editorial team and cross-verified against vendor records on the live marketplace.
Royal Pleco (L-191) (Panaque nigrolineatus) is a freshwater fish kept by aquarists for community + species-specific freshwater displays. Suitable for keepers with 6-12 months of experience and stable water chemistry.
Where Royal Pleco (L-191) comes from
Royal Pleco (L-191) (Panaque nigrolineatus) is native to specific tropical and subtropical freshwater systems. The captive-bred Royal Pleco (L-191) sold at most LFS comes from generations of farmed stock and is generally hardier and better-acclimated to tank conditions than wild-caught equivalents. Wild specimens are occasionally available for keepers chasing original-bloodline coloration or biotope-accurate stocking.
Royal Pleco (L-191) tank size and setup
Royal Pleco (L-191) requires a minimum of 120 gallons for healthy adults. The minimum is based on the species' adult size (17 inches), territorial range, and behavior pattern. Most Royal Pleco (L-191) sold at small juvenile size will reach full adult size within 12-24 months and the system must be sized to the adult, not the juvenile.
For a Royal Pleco (L-191) setup: tank sized for the adult footprint, HOB or canister filter rated 4-6x tank volume, dechlorinated water, appropriate temperature heater, and stocking-appropriate hardscape and plants.
Royal Pleco (L-191) prefers freshwater parameters: Temperature: 74-80°F pH: 6.5-7.5 GH: 4-12 dGH KH: 3-8 dKH Ammonia + nitrite: Both 0 ppm Nitrate: Under 20 ppm long-term Copper: 0 (especially critical for invertebrates)
Use dechlorinator on every water change. Test parameters weekly during cycling, biweekly once stable. Stable consistency beats sliding-scale "ideal" parameters.
What Royal Pleco (L-191) eats
Royal Pleco (L-191) is a wood/herbivore. Diet matches species requirements; check the species type for specifics. Feed Royal Pleco (L-191) appropriately for its size + activity level. Overfeeding is the #1 cause of water-quality crashes in tanks of all sizes.
Royal Pleco (L-191) tankmates and compatibility
Royal Pleco (L-191) works in community tanks with peaceful species in similar size class. Adult-size matters more than purchase-size when planning stocking. Avoid mixing aggressive with passive species.
Browse care guides for tankmate-compatibility tables for Royal Pleco (L-191) and similar species.
Royal Pleco (L-191) adult size and lifespan
Royal Pleco (L-191) reaches 17 inches at adulthood with a captive lifespan of 10-20 years with proper care. Most freshwater species live 3-10 years; larger species (oscars, plecos, knifefish) reach 10-20+ years.
Can you breed Royal Pleco (L-191)?
Royal Pleco (L-191) can be bred in dedicated breeding tanks with appropriate setup and water-chemistry triggers. Catfish often need very specific water conditions and substrate to spawn; research the species before attempting.
Common Royal Pleco (L-191) diseases and problems
Royal Pleco (L-191) is susceptible to standard freshwater diseases (ich, columnaris, fin rot, bacterial infections). Quarantine new Royal Pleco (L-191) for 4 weeks before adding to your display tank. Treat fish in a separate hospital tank to avoid affecting plants and inverts. Most disease outbreaks trace back to poor water quality, chronic stress, or skipped quarantine.
Where to buy Royal Pleco (L-191) online
Royal Pleco (L-191) is sold at LFS (local fish stores), online retailers, and direct from breeders/wholesalers. Pricing varies widely by source, size, and quality:
Browse live Royal Pleco (L-191) from vetted Fast Aquatics vendors with carrier-tracked overnight shipping (FedEx Priority + UPS Next Day), climate-aware hold logic, and a 4-hour DOA window with photo-evidence claims. Captive-bred or aquacultured specimens cost more upfront but arrive healthier and integrate faster.
Royal Pleco (L-191) FAQ
How big does Royal Pleco (L-191) get?
17 inches at adulthood within 12-24 months.
How long does Royal Pleco (L-191) live?
10-20 years with proper care.
What is the minimum tank/pond size?
120 gallons, with larger systems strongly recommended.
Is Royal Pleco (L-191) hard to keep?
Royal Pleco (L-191) is rated intermediate difficulty.
What does Royal Pleco (L-191) eat?
Royal Pleco (L-191) is a wood/herbivore; appropriate diet matches its natural feeding pattern.