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			 14 hours is a long photo period. 10 or 12 would be more like it. Do you run a skimmer. A good skimmer should take care of green water pretty quick. 
		
	
		
		
		
		
		
	
		
		
	
	
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			#2  
			
			
			
			
			
		 
		
		
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			 How often do you do water changes? How much live rock? Skimmer? sump? bioload? How long has the tank been set up? I think there would be more to this equation than just your photo period. 
		
	
		
		
		
		
			
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			#3  
			
			
			
			
			
		 
		
		
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			 I think your nitrate/nitrite levels and propably even more important is your phosphate levels.  Have you tested your phosphates?  I would try and keep them undetectable (<0.015ppm). 
		
	
		
		
		
		
			
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	300 gal starphire custom built in pentagon reef (+90 gal sump on Blue Line 100 HD return pump, 210lb LR, Euro-Reef RC250 skimmer, 2x400W MH, 2x28W compacts, 2xTurbelle classic 4002 pumps & Turbelle Stream 6100 on 7095 Multicontroller, running ZEOvit) Livestock Fish: damsels; sailfin, yellow, regal & naso tangs; ocellaris & tomato clowns; lyretail anthias; foxface lo; flame angelfish corals: a few  | 
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			#4  
			
			
			
			
			
		 
		
		
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			 for a quick solution run a skimmer and cut out the lights completely for two-three days.  If the tank gets sunlight, then use drapes.  the only light i allow is faint sunlight (through the drapes) and ambient lighting.  I do this on a monthly basis for 3 days. 
		
	
		
		
		
		
		
	
		
		
	
	
	here's where that idea comes from... http://reefcentral.com/forums/showth...readid=1078532 but that's no guarantee the bloom will stay away. you need to find the root of the problem. a certain kind of algae in the tank? nutrient problem (nitrate, phosphate, w/e)? too long a photoperiod (i leave mine at 10hours a day)?  |