G. Ghost: sounds like a nice set up. adding a sump is a good way to increase water volume. Have you thought about an overflow as well? your sump could return to a small tank above your main tank. in this tank you could have sand and live plants. you could also grow smaller organisms in it that would flow down to feed the fish in your main tank. you could have the return to the main be a water fall set up
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In all things of nature there is something of the marvelous.
Aristotle
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