| That pump would probably work. With your dimensions you will have about a 225 gallon tank. How many koi do you want to put in there? No matter how many you put in I would think that since you will have too many in a smaller then normal space for a long amount of time I would at least double the filtration (probably triple on 225 gallons). My 700 gallon QT has a filter on it that can handle up to 5000 gallons. As for filters you could use big rubbermaid containers or trashcans etc. 3-30 gallon containers is another 90 gallons of water which is a good thing.
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