Care guide, husbandry, breeding, disease, and sourcing intelligence on Shiro Utsuri Koi - written by the Fast Aquatics editorial team.
Shiro Utsuri Koi at a glance
Adult size: 24-36 inches · Min tank/pond: 1000 gallons (pond) · Difficulty: intermediate · Diet: omnivore · Lifespan: 25-50 years.
Shiro Utsuri 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 Shiro Utsuri Koi comes from
Shiro Utsuri Koi (Cyprinus rubrofuscus) is a pond fish species adapted to pond ecosystems. Adapted to seasonal temperature swings, leaf litter, and outdoor water chemistry.
Shiro Utsuri Koi tank size and setup
Shiro Utsuri 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 Shiro Utsuri Koi
Shiro Utsuri 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 Shiro Utsuri Koi eats
Shiro Utsuri 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.
Shiro Utsuri Koi tankmates and compatibility
Shiro Utsuri Koi is compatible with similar-temperament pond fish at appropriate stocking. Plan stocking around adult sizes and territorial behaviors.
Shiro Utsuri Koi adult size and lifespan
Shiro Utsuri Koi reaches 24-36 inches at adulthood with a captive lifespan of 25-50 years with proper care.
Can you breed Shiro Utsuri Koi?
Shiro Utsuri Koi spawning happens in spring as water warms; provide appropriate spawning substrate and consider separating eggs to prevent predation.
Common Shiro Utsuri Koi diseases and problems
Shiro Utsuri Koi can develop pond-specific issues: parasites, bacterial infections, and seasonal stress around water temperature transitions.
Where to buy Shiro Utsuri Koi online
Shiro Utsuri Koi is sold at LFS, online retailers, and direct from breeders. Browse live Shiro Utsuri 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.
Shiro Utsuri Koi taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.