Care guide, husbandry, breeding, disease, and sourcing intelligence on Kawarimono Koi - written by the Fast Aquatics editorial team.
Kawarimono Koi at a glance
Adult size: 24-36 inches · Min tank/pond: 1000 gallons (pond) · Difficulty: intermediate · Diet: omnivore · Lifespan: 25-50 years.
Kawarimono Koi (Cyprinus rubrofuscus) is a popular pond species in the aquarium and pond hobby. Suitable for keepers with 6-12 months of stable-tank experience.
Where Kawarimono Koi comes from
Kawarimono Koi (Cyprinus rubrofuscus) is a pond fish species adapted to pond ecosystems. Adapted to seasonal temperature swings, leaf litter, and outdoor water chemistry.
Kawarimono Koi tank size and setup
Kawarimono Koi requires a minimum of 1000 gallons (pond) for healthy adults. The minimum is based on 24-36 inches adult size and territorial range. Plan an outdoor pond with appropriate depth (3+ feet for cold-climate winterization), filtration sized 1.5-2x pond volume per hour, UV clarifier, and surface skimmer.
Water parameters for Kawarimono Koi
Kawarimono Koi prefers pond parameters: temperature 50-78°F seasonal swing for cold-tolerant species, pH 7.0-8.5, ammonia + nitrite 0 ppm, nitrate under 40 ppm, dissolved oxygen 5+ mg/L (aerator non-optional in summer).
What Kawarimono Koi eats
Kawarimono Koi is a omnivore. Provide a varied diet of pellets, frozen foods, and supplemental greens. Feed twice daily in small portions. Browse our food guides for product recommendations.
Kawarimono Koi tankmates and compatibility
Kawarimono Koi is compatible with similar-temperament pond fish at appropriate stocking. Plan stocking around adult sizes and territorial behaviors.
Kawarimono Koi adult size and lifespan
Kawarimono Koi reaches 24-36 inches at adulthood with a captive lifespan of 25-50 years with proper care.
Can you breed Kawarimono Koi?
Kawarimono Koi spawning happens in spring as water warms; provide appropriate spawning substrate and consider separating eggs to prevent predation.
Common Kawarimono Koi diseases and problems
Kawarimono Koi can develop pond-specific issues: parasites, bacterial infections, and seasonal stress around water temperature transitions.
Where to buy Kawarimono Koi online
Kawarimono Koi is sold at LFS, online retailers, and direct from breeders. Browse live Kawarimono Koi from vetted Fast Aquatics vendors with carrier-tracked overnight shipping, climate-aware hold logic, and a 4-hour DOA window with photo-evidence claims.
Related pond species you might also keep
Other species in the same category with care profiles on Fast Aquatics. Click any name for the full husbandry breakdown.
Kawarimono Koi taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.