Introduction Quick answer: A Shiro Utsuri is a black-bodied koi overlaid with bold white markings (shiroji), part of the Utsurimono group alongside Hi Utsuri and Ki Utsuri. It’s most often confused with the Shiro Bekko, a different fish worth checking for before you buy — the difference comes down to whether the black reaches the
Shiro Utsuri Koi: Identification, Buying & Care Guide Read More »
Quick answer: Breed guppy fish by keeping one male to every 2–3 females in a mature, planted tank at 24–28°C (75–82°F) and pH 7.0–8.0. Watch the female’s belly for a dark “gravid spot” near her vent — that means she’s due to give birth within a few days. Move her to a breeding trap or
How to Breed Guppy Fish: A Step-by-Step Guide (With Real Cost Data) Read More »
Quick answer: As a general rule, allow 250 gallons of pond water per adult koi (koi grow to 18–24+ inches). For young koi under 6 inches, a safer starting point is 10 gallons per inch of fish — but you’ll need to re-stock down as they grow, since a 4-inch koi you buy today can
Koi Stocking Density: How Many Koi Per Gallon? (Free Calculator) Read More »
Quick Answer Kohaku is a koi variety with a white body (Shiroji) and red markings (Hi), and it’s the founding member of the “Gosanke” — the three most prized koi varieties alongside Sanke and Showa. Quality is judged on the whiteness of the skin, the depth and evenness of the red, sharp clean edges between
Kohaku Koi: History, Judging Terms & Every Pattern Type Explained Read More »
Quick Answer Koi pond maintenance breaks down into four cadences: daily (remove debris, check fish behavior), weekly (test pH/ammonia/nitrite, clean skimmer basket), monthly (deep-clean filter media, inspect equipment), and seasonal (spring startup, fall shutdown prep). Feeding and testing frequency should also shift with water temperature — stop feeding below 50°F, switch to wheat-germ food between
Koi Pond Maintenance Schedule: Daily, Weekly, Monthly & Seasonal Checklist Read More »
Quick Answer The best koi pond plants fall into four categories: submerged/oxygenating (hornwort, eelgrass), floating (water hyacinth, water lettuce, water lily), marginal (scouring rush, water smartweed), and bog plants for the pond’s damp edges. Koi will nibble roots and leaves on some species (hyacinth, lily, lettuce) but generally avoid others (lotus, horsetail, eelgrass). A balanced
Best Plants for Koi Ponds: 7 Species by Category (+ What Koi Won’t Eat) Read More »
Quick Answer Herons, raccoons, and cats are the most common koi pond predators. Netting, decoys, motion-activated sprinklers, and adequate pond depth are the most effective defenses — most keepers combine two or three methods rather than relying on just one, since predators adapt to a single deterrent over time. Protecting your koi pond from predators
How to Protect Koi Fish from Predators: Herons, Raccoons & Cats Read More »
Quick Answer Homemade koi food should hit 35–40% protein from sources like shrimp, krill, or fish, bound together with unflavored gelatin (about 20g per 500g of wet mix), then frozen in small portions. Feeding needs change with water temperature: high-protein growth food in summer, light wheat-germ-based food in spring and fall, and little to none
How to Make DIY Koi Food: Recipes, Protein Targets & Seasonal Feeding Read More »
Quick Answer Koi fish range from $10–$50 for domestic juveniles to $1,000–$50,000+ for champion-grade imported Japanese koi — the record sale was $1.8 million. Price is driven by four grading factors: body conformation, color depth, pattern quality, and skin clarity. When buying, check for clear eyes, smooth undamaged scales, active swimming, and buy only from
Buying Koi Fish: Price Guide, Grading & What to Look For Read More »
Quick Answer Your koi pond filter needs to circulate your entire pond volume every 1–2 hours (GPH). The formula: Pond Volume × Turnover Multiplier = Required GPH. Light stocking uses a 1x multiplier, moderate stocking 1.25–1.5x, and heavily stocked ponds need 1.5–2x. A good system combines mechanical filtration (traps debris) with biological filtration (beneficial bacteria
Koi Pond Filter Guide: How to Size, Choose & Install the Right System Read More »