My understanding is that UGFs are a thing of the past. I'm interested in why you would want to use one in a reef, given the other, superior filtration methods now available?
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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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