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Old 01/12/2008, 01:04 AM
old salty old salty is offline
Mortar Target
 
Join Date: Jun 2005
Location: The Island of Misfit Toys
Posts: 2,870
I don't think it's the live rock that harms them. Rock displaces water, to the more rock you have, the less water you have. If you have a 200g tank and you fill it with 400 lbs of rock, you may only have 50 gallons of water left over. Start adding a whole bunch of fish and you get some serious pollution.
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