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#6
04-26-2007, 03:24 PM
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for the beginners:
-when selecting LR, choose pieces that are porous and have a lot of holes. not only is it cheaper, but a porous piece provides more surface area for biological activity. -when designing a system, don't forget flow. it's almost as important as light. and with the new affordable flow pumps on the market, there's no excuse for lack of it. 
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