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			 I had the same problem when I changed my halides from 175W to 250W.  I spoke to someone at Coralife and they said it was because of the higher wattage that caused the problem.  I had no problems with the mechanical Coralife timer when I was just running the 175W.  I got the digital ones from Coralife and so far no problems with the 250W. HTH 
		
	
		
		
		
		
		
	
		
		
	
	
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			#2  
			
			
			
			
			
		 
		
		
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			 Before I bought my controller I always used the mechanical ones.  I tried the digital ones once in the past but found that they "lost" time over a period. 
		
	
		
		
		
		
			
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	- Greg 90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2  |