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#28
11-13-2009, 06:46 PM
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the 305 fluval, i guess the 304 is the older model, is 260GPH.
and the 1600 L/H power head is 400GPH. 660 for a 72 is less then 10X turnover very bad for accumulation in sand bed. did you run your fluval with or without media? and there wasn't any other circulation? 20X+ is best for reef tanks. 
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