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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The irony of 2007 is a disgustingly fat multi-millionaire trying to tell me I need to cut back on my consumption.
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