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Old 01-01-2004, 06:29 PM   #1
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Overflow Box

When DIYing an overflow, does it matter how big the box is? or just the pipe that goes into the sump? Im doing two overflows, one for a 55 and another for a 25. for the 25 i wanted to to have a 4x4x4 inch boxes and for the 55 8x4x4 inch. will these be large enough if i drilled the appropriate size holes for the water flow? thanks.

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Old 01-01-2004, 08:51 PM   #2
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I think that as long as you can fit the necessary pipe size to handle your overflow, the box doesn't really matter...yuo can just make it to the dimensions you need. I think a 1" PVC pipe will allow approx. 600gph, but don't quote me on that. But anyways, I don't think the box size matters...all I know is that I read the longer the box on the interior, there is more true surface water drawn in, and less subsurface (though only by a cm or so) water. The more surface water, the more DOC is skimmed from the surface by the overflow box. I'm cheap, so I just made the neat little overflow that BillyZ designed. Cost me $25 to build 2 of them at 1½" pipe. =] Hope this helps you out!

125 gallon saltwater: 55gal sump, 4 Blue-Green Chromis, Purple Tang, True Perc, Firefish, Royal Gramma, 5 Ricordea, Bubble Coral, 15 Pulsing Xenia, Green Star Polyps, Deresa clam, Green-Tip Torch Coral (about 11 "heads"!), Orange Montipora Cap, Purple M. Digitata, Green Slimer Acro. Yongei, 3 Orange M. Digitata, Pink&Green Acro. Millepora
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Old 01-02-2004, 12:17 AM   #3
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It does thanks a lot
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flow, overflow, overflow box

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