What is a koi pond? Koi ponds are large man-made ponds made specifically for the koi fish. These ponds are made with a safe border so that no predator can harm the koi fishes. Koi ponds are made up of a circulation system, filters, aqueous plants, rocks, and koi fish. Video Source Circulation systems help the water to flow, remove the debris and algae from the bottom of the pond and generate oxygen in the tank. Filters are of two…

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