Sumps are pretty simple to build and don't need to be pretty to be functional. I have seen a few really cheap 75g tanks for sale that would probably work nicely. I usually like to go a little bigger on the sump so there is always room for the overflow water when the power goes out or the return pump stops, don't rely on check valves (I won't even install them). LxWxH in inches then divide by 231 gives you gallons to calculate the volume. Flow through the sump does not need to be fast. I usually aim for around 5X tank volume (600 gph in your case) at head. If you decide on a skimmer before hand you can plan your sump baffles to suit.
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09-22-2014, 11:24 PM
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