Start here · Essential guide
How to Take Care of Koi Fish
Learn how to care for koi: pond size and depth, filtration, water quality, feeding, quarantine, winter, health signs, and what keeping koi really involves.
Freshwater Fish
Koi & Goldfish
Koi and goldfish care, feeding and winter.
Fish That Look Like Koi
Fish that look like koi: sarasa comets, shubunkin, orfe, koi medaka, koi bettas and livebearers, plus how they differ from real koi in size and care.
Koi Fish Winter Care
How to care for koi in winter: when to stop feeding, pond depth, keeping a gas exchange hole open, autumn prep, baking soda, snakes, and spring start-up.
Red Cap Oranda Goldfish Lifespan
How long do red cap oranda goldfish live? Typical lifespan, what shortens it, tank size, diet, tank mates, how to judge a goldfish's age, and care tips.
What Do Koi Fish Eat?
What koi eat: pellets, wheat germ and growth foods, safe treats, rice and meat questions, how much to feed, and how water temperature changes feeding.
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