I wouldn't remove the live rock from the tank, as it's a lot of work and might interfered with the filtration capacity of the rock, etc. Spending a few minutes every day or maybe every working siphoning out as much of the slime as is easy to get can be useful. Reducing feeding can help, sometimes, too. I might stop feeding for a week, and see what happens.
How much GFO is being used, and how often is it being changed?
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Jonathan Bertoni
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