im having the same problem.  I have really good flow. Could me having to change bulbs be the cause for this slime outbreak? 
and my clam wont open  I saw its mantle was curled up a few days ago 
 
50g DT ,20g sump, skimmer 2 korilla powerheads both at 1200gph and a rio17 
return pump 
		
	
		
		
		
		
		
	
		
		
	
	
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