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					Originally Posted by  Ryan-b
					 
				 
				I also have he marine magic doser, and couldn't be happier. It's been running for 8 months now.  
 
Are you dosing all of your alk at the same time? If so that could be causing a swing in your ph. Also dosing the alk at night every couple hours will keep your ph more stable. 
			
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 What speed, frequency and  time do you suggest?
Currently I had it set twice daily (kh) and calcium once.  For about a minute each on speed two.