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Old 09-10-2006, 11:26 AM   #13 (permalink)
BoomerD
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Join Date: Nov 2003
Location: Northern California
Posts: 5,637
Re: Benthic zones in sump.

A deep sand bed needs to be at least 4" deep in order to work properly. Some people try to get by with 3", but IMO, that's not a fully functional DSB. I don't understand what you're trying to accomplish with that, but it doesn't seem like it will work properly to me...
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