If you don't mind a suggestion.... I'd raise the sump off the ground as much as you can (within reason). There will be times when you want to siphon the bottom of the sump for cleaning and if it's on the ground you may have trouble getting a good siphon. I'm stuck with my sump right now, it's under the tank and at 3 inches off the ground cleaning the bottom is a chore. Other than that it's a cool set up, a 90 is an awesome tank to work with.
Doug
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