Mason, the way I add kalk is with a float valve. All my makeup water was full strength kalk. When I used only kalk on my 75g, I would go thru about a gallon per day. Never had a pH problem.  Your levels are fine now, so dosing full strength would probably be fine. Do you have a float valve setup? Or how do you normally add top off water? 
		
	
		
		
		
		
			
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				Brad
			 
		
		
		
		
	
		
		
	
	
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