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#23
March 2nd 07, 03:21 PM
posted to rec.aquaria.marine.reefs
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Ich and tang...
Pszemol wrote:
Plenum is an empty space UNDER the sand, so I am not sure how can you understand the advice on vacuuming it... Apologies. I'm reading a book that appears to substitute Plenum for sand as it doesn't want to confuse the reader with silica sand. --Kurt 
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