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			 What are you using for substrate?  How are you maintaining the substrate?  How old is the substrate?  I'm not saying that it IS the substrate, but it's most likely a factor.  Also, how old are your bulbs?  Could they have shifted to a more yellow spectrum now which is causing the algae growth? 
		
	
		
		
		
		
			
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	32"x32"x20" Cube-ish tank  |