I have some fuzzy mushrooms in a bad spot. I can't move the rock to get it out and cutting would be hard.  
I covered it with a layer of kalk paste. It shrank it good, and I'm repeating till dead. 
hasn't affected anything else in my tank.  
Sure makes it cloudy for a bit but it goes away. 
I dose kalk anyway so I just don't dose for the day.  
 
Oh and shut off all my pumps and let the slurry just sit on it as long as possible. 
 
can only do a few at a time or the tank chemistry will go WAY off. mine doesn't seem to mind a few shrooms at a time. 
		
	
		
		
		
		
		
	
		
		
	
	
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