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If the pond is at least 3 feet deep, you may be able to put a few Koi, but they can grow very large (up to 2 feet in size!) and can outlive their owners.

This is also going to depend on the climate where you live, if you have many plants, moving water to add oxygen etc.

Standard Koi ponds are typically a minimum of 1000 gallons.

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12y ago

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