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Old 04-03-2011, 03:58 PM   #1
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Overflow hole sizes on a 90G tank

Hi Guys.

I'm having a 90 G tank built, and was wondering what you thought of the size of the drain and return holes. I'm thinking of going 2 inch for drain and 1.5 inch for return. All this will be in a center overflow.

Thanks in advance for the help.

Viks
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Old 04-03-2011, 08:02 PM   #2
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2" is fine, but bigger than necessary. You can easily get away using a 1.5" drain line. You want aprox 5x-10x your water volume flowing thru your sump. A 1.5" drain will give you about 600 gph...depending, of course, on the size of your return pump.
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Old 04-03-2011, 08:24 PM   #3
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Thanks for that. What kinda of return pump would you suggest for this setup?
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