I have my waste restricted to about 50/50 with the fresh and I do not notice a reduction in production. Your system may be different though. I have been running it this way for over six months and I am still getting 0ppm and about 400ppm on my waste (or should I say laundry) water. 
		
	
		
		
		
		
		
	
		
		
	
	
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