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Those koi are inside my house in a 700 gallon holding tank. The filter on that system is an Aquabead 4.25 unit. Its been up since last Oct. I have a 2500 gallon pond outside using a converted sand filter and a filter made using a rubbermaid stock tank. I'm also in the middle of rebuilding a 700 gallon pond out back into a 5500 gallon pond. The Aquabead will be going on that as well as a Savio skimmer and I'll be building a concrete block seperator using an Answer.
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