I can only speak from personal experience and I have to say that one of the best peices of equipment I have bought is my calcium reactor.  It takes time to dial it in but once done it has been great.  I have previously used kalkwasser and I know that people have great success with it but I really stuggled to find a balance with PH.  I have to say at the time I believe that I had low magnesium just didn't know enough to test for it. 
		
	
		
		
		
		
		
	
		
		
	
	
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