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			 Anyone have experience using cement in a tank? I have heard they will cause chronically high pH?  will this taper off over time?  
		
	
		
		
		
		
		
	
		
		
	
	
	I am trying to make a wall for the back of my 30Gal Hex and am contemplating using cement with embedded LR. (LR will die during construction i know) thoughts?  | 
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