Koi fish also know as Japanese Koi was originate from Japan, but some record also said it was from China, and has over the years been disseminated around the world. They life span is 20 to 30 years and can grow up to 30 inches.

Mostly people keep koi fish in a pond rather than in a aquarium tank, it is because this kind of fish need a bigger space and natural environment, therefore you need to have a pond can hold 500 gallon of water with at least 20 inches deep.

Generally maintenance of koi pond is expensive and time consuming, so is recommended to plan carefully before you start to build your koi pond.

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