To avoid cloudiness (and precipitation), I've had the best luck with: 
 
- no heater before mixing 
- constant circulation during mixing 
- not adding entire amount of salt at once (I mix ~40 gallons at a time, and I do it in about 3-4 chunks of adding salt, spacing the addition of salt by several hours) 
- if your make-up water is still cloudy after 24 hours of mixing, and your salinity is good (I mix to 35ppt), it might just be cloudy and is likely okay to use. 
		
	
		
		
		
		
			
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				Single System Setup:  210G SPS reef, 225G FOWLR, 72G water change, 50G frag, 120G sump.  I promise a journal at some point!  (anyone need some coral frags? I likely always have stuff that is frag-ready)
			 
		
		
		
		
	
		
		
	
	
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