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I have a 20g tank set up with about 20lbs of live rock, 1.5" sand bed and a remora HOB skimmer? Since I am not running a sump does this tank require some type of mechanical filration?
As reef said I've used a canister before but do nit run carbon all the time do to the fact that it pulls many of good things u want in ur tank out. But filter floss and and some other pads would be great for polishing.
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