Best for the Money: SunSun CBF-350 Biological Pond Filter. "A special filter sponge, japan matting, and section for additional filter media, suitable for a high flow rate of 2113 GPH, for ponds with fish up to 1,500 gallons or ornamental ponds up to 3,000 gallons." Best for Small Ponds: Pennington Aquagarden Inpond 5 in 1. PQHx3ga. How Much Do Gold Koi Fish Cost? Amazingly, Gold Koi can be purchased for as little as $10 but can also be sold for thousands of dollars. The factors that set one apart include the fish’s shape (torpedo is best), color, and color patterns. A The amount could range from 150 to 250 gallons per fish. If you are starting out with small 6″ to 8″ long koi, they can reach 2 feet in three years, depending on how much food and how often you feed them. They could even grow to over 3 feet long! The overcrowding of fish produces stress and a lot of waste material. How Much Do Black Koi Fish Cost? The price of koi fish ranges depending on the variety, rarity, and size of the fish. The larger and rarer the fish is, the more expensive the fish will be. True varieties of black koi like the Karasugoi are priced from $100 to $1,800. Best for the Money: SunSun CBF-350 Biological Pond Filter. "A special filter sponge, japan matting, and section for additional filter media, suitable for a high flow rate of 2113 GPH, for ponds with fish up to 1,500 gallons or ornamental ponds up to 3,000 gallons." Best for Small Ponds: Pennington Aquagarden Inpond 5 in 1. Kodama Koi Farm is the premier destination for quality Japanese Koi. We are the largest importer of Koi in North America. We specialize in raising champion koi fish! P.O. Box 893086, Mililani HI 96789. TEL: +1 (833) Koi Love (1-833-564-5683) FAX 888-692-3990 Email: info@kodamakoifarm.com Help: info@kodamakoifarm.com. Hours of Operation Monday The cost of a Kohaku koi can range from $50 to a staggering $1.8 million. In 2018, the most expensive koi fish ever sold was over three feet long and purchased by a Taiwanese buyer for $1.8 million. 2. Sanke – up to $341,990. Sanke koi fish is one of the most expensive koi fish and has distinctive color patterns.

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