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					Originally Posted by  tang daddy
					 
				 
				I feel you're talking about the bryopsis then yes it just sucks the nutrients out of the rock, why not remove the rock and replace with new rock? 
It took me 2 times to kill the bryopsis that grew in my sump, first time I dosed 1/4 the suggested dose the last time I did full dose and less than a week it was gone, never came back. 
			
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 This is only my 40 gallon "quarantine tank" I plan on dismantling it and moving it downstairs to become my frag tank at some time in the near future.  For now I just play with it trying different things.  My new display tank has no bryopsis, I made sure of it when I set it up last year using all new rock.