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#5
09-14-2003, 08:32 PM
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I have ~2500gph turnover (~17x), return via a Mag12, overflow through a 2" pipe. Where the water exits the overflow in the sump I have legions of amphipods (the shrimp-thing that you are seeing, best picture I could find below). I would have expected them to be blown around but they seem to have excellent grip. I even see them on the pump intake on occasion.
I do not get sand blowing around unless my goby really gets excited. 
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-Quinn Man, n. ...His chief occupation is extermination of other animals and his own species, which, however, multiplies with such insistent rapidity as to infest the whole habitable earth, and Canada. - A. Bierce, Devil's Dictionary, 1906 
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