Overflow Boxes

Discussion in 'Filters, Pumps, etc..' started by RickGrimes, Dec 15, 2009.

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  1. RickGrimes

    RickGrimes Spaghetti Worm

    Joined:
    Oct 5, 2009
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    187
    How fast of a GPH rating should my overflow box have for a 20g DT with a 15g sump?
     
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  3. GuitarMan89

    GuitarMan89 Giant Squid

    Joined:
    Mar 31, 2008
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    5,736
    Location:
    Wilmington, DE
    It doesn't matter that much, just make sure it's more than the pump you get, the pump really decides what the GPH will be. You could get an 800gph overflow and if you a 200gph pump, only 200gph will flow through your sump.
     
  4. skiergd011013

    skiergd011013 Peppermint Shrimp

    Joined:
    Nov 5, 2009
    Messages:
    449
    i have an eshopps 300 overflow, and a mag 5 and they work great together i have about 4 feet of pump head for the mag 5 so i guess im getting right around 300 gph