That's an interesting point, one I've heard before but never thought too much about. I wonder if it might be a good thing to let some of that crud stay in the tank for a while. You know how they say that kids these days have so many allergies because we're all too clean... maybe our tanks are the same, and we need to let them wallow in filth for a bit, so to speak.
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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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