04-25-2012, 12:31 PM
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Turtles and Koi
don't go well together. Your pond is also too small for Koi
(in water volume and swimming room). One adult Koi
needs 500 gallons of water and a depth of at least 3 feet to be healthy. One or two Goldfish
are a better option. And even then, they will probably become food for the turtles. You need to chose, either fish or turtles.
As for filtration, Tazman's got you covered. For a pond of this size you are going to want 10x the water volume per hour pump. It's only the larger ponds (5000+ gal) that can get away with less. For a good waterfall pump, look at a pump with higher head pressure (this means it will be able to push the water up a slope to fall back down as your waterfall).