I am running a full on mixed reef. Zoas, lps, sps and one leather(toadstool). I do run carbon in a TLF reactor. I have removed  my other leathers not because of what I thought they were releasing in my tank but because they can be so invasive. I too, wasnt getting good PE during the day(PE was good at night), until I started a Pohl's product dosing regiment( not full on Zeo but a few of their additives). PE is now crazy and my color is deepening. 
		
	
		
		
		
		
			
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				260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065,  2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).  http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here  http://www.vimeo.com/2304609 and here  http://www.vimeo.com/16591694
			 
		
		
		
		
	
		
		
	
	
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