Dont need holes for Closed Loop. Use a Submersable pump in display tank. Its what I did. Loop pump is inside internal overflow. I only had 2 holes in my tank too. So,those 2 are used for Sump drain and return. Flow in tank is mostly made form the CL. Works great.
My tank has a flat top, didnt want an over the top Sump return. But, if your config allows it, I would use the 2 holes fro drains, and sump return over the top. Use 1 drain as main, adn the other as emergency. I had a snail get over my eggcrate and into drain, plugged it. Good thing the sump volume wouldnt overflow tank. It was right at the top, when I got home. Sump pump was sucking air too. Can you say Microbubbles galore
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Dan Pesonen
Umm, a tank or 5
Last edited by banditpowdercoat; 06-01-2008 at 07:20 PM.
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06-01-2008, 07:16 PM
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