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and overflow questions

  1. General Reef Discussion
    I have a 75 gal. reef tank with a 2 inch sand bed. Decided to put a hang on overflow to sump. Right now have a Penguin 440 hang on filter, Magnum 330 Canaster filter, and a Protein Skimmer. I am going to take it all of and run a 30 gal. sump with the overflow. I can't decide on what pump and...
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