| I have pool filter sand in mine and have had good experiences. My plecos don't really mess with the sand, and pool filter sand is pretty coarse ... so even when it gets disturbed ... it doesn't float. So, personally, I haven't had any filter problems at all. (55g w/ aquaclear 300).
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55g - fw - live plants - 3 yo-yo loaches (Botia lohachata), Botia histrionica, 2 clown loach (Chromobotia macracanthus), rubber lip pleco, 10 Yellow Labs (Labidochromis caeruleus), 2 Melanochromis johannii
46g - a bunch of juvenile Yellow Labs, 3 yo-yos, 1 demasoni, and a synodontis
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