Care guide, husbandry, breeding, disease, sourcing, and tankmate intelligence on Rosy Red Minnow - written by the Fast Aquatics editorial team and cross-verified against vendor records on the live marketplace.
Rosy Red Minnow (Pimephales promelas) is a pond species kept by aquarists for outdoor pond stocking. Hardy and forgiving of typical beginner mistakes when given proper water chemistry.
Where Rosy Red Minnow comes from
Rosy Red Minnow (Pimephales promelas) is a pond fish species suited to outdoor pond environments. Adapted to seasonal temperature swings, leaf litter, and outdoor water chemistry. Cold-tolerant species overwinter in zone 5-7 ponds at 3+ feet depth; tropical pond fish need to be brought indoors or kept in heated systems.
Rosy Red Minnow tank size and setup
Rosy Red Minnow requires a minimum of 300 gallons (pond) for healthy adults. The minimum is based on the species' adult size (2-3 inches), territorial range, and behavior pattern. Most Rosy Red Minnow 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 Rosy Red Minnow setup: outdoor pond with appropriate depth (3+ feet for cold-climate winterization), filtration sized 1.5-2x pond volume per hour, UV clarifier for green-water control, surface skimmer for leaf litter, and either a bottom drain or annual full cleanout.
Rosy Red Minnow prefers pond parameters appropriate to your climate zone: Temperature: 50-78°F seasonal swing acceptable for cold-tolerant species; tropical pond species need 70°F+ year-round. pH: 7.0-8.5 Ammonia + nitrite: Both 0 ppm Nitrate: Under 40 ppm in established ponds Dissolved oxygen: 5+ mg/L (aerator non-optional in summer)
Pond water chemistry shifts with rainfall, leaf decay, and bioload. Test biweekly during active season; perform 10-25% water changes monthly to maintain stable parameters.
What Rosy Red Minnow eats
Rosy Red Minnow is a omnivore. Eats a varied diet of pellets, frozen foods, and supplemental greens. Quality flake or pellet (Hikari, New Life Spectrum, Tetra) plus frozen mysis or bloodworms 2-3x weekly produces best color and behavior. Feed Rosy Red Minnow appropriately for its size + activity level. Overfeeding is the #1 cause of water-quality crashes in tanks of all sizes.
Rosy Red Minnow tankmates and compatibility
Rosy Red Minnow is compatible with similar-temperament pond fish at appropriate stocking. Mixing predatory species (largemouth bass) with smaller pond fish (minnows, juvenile koi) creates a food chain. Plan stocking around adult sizes and territorial behaviors.
Browse care guides for tankmate-compatibility tables for Rosy Red Minnow and similar species.
Rosy Red Minnow adult size and lifespan
Rosy Red Minnow reaches 2-3 inches at adulthood with a captive lifespan of 2-3 years with proper care. Pond fish often outlive their owners under proper care - koi can live 25-50+ years with stable parameters.
Can you breed Rosy Red Minnow?
Rosy Red Minnow spawning happens in spring as water warms; provide appropriate spawning substrate (rocks, plants, brushes) and consider separating eggs to prevent predation.
Common Rosy Red Minnow diseases and problems
Rosy Red Minnow can develop pond-specific issues: parasites (ich, costia, trichodina), bacterial infections (ulcers, fin rot), and seasonal stress around water temperature transitions. Maintain stable temperature changes (no more than 5°F per day during seasonal shifts), feed appropriately for water temperature, and inspect fish during spring restart for signs of overwintering damage.
Where to buy Rosy Red Minnow online
Rosy Red Minnow is sold at LFS (local fish stores), online retailers, and direct from breeders/wholesalers. Pricing varies widely by source, size, and quality:
Browse live Rosy Red Minnow 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.
Rosy Red Minnow FAQ
How big does Rosy Red Minnow get?
2-3 inches at adulthood within 12-24 months.
How long does Rosy Red Minnow live?
2-3 years with proper care.
What is the minimum tank/pond size?
300 gallons (pond), with larger systems strongly recommended.
Is Rosy Red Minnow hard to keep?
Rosy Red Minnow is rated beginner difficulty.
What does Rosy Red Minnow eat?
Rosy Red Minnow is a omnivore; appropriate diet matches its natural feeding pattern.
Rosy Red Minnow taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.