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					Originally Posted by  Casey8
					 
				 
				Do you mean my tank has too much nitrates and phosphates ? ... I have never tested for them. I didn't know the yellow is the hardest to keep their color. 
			
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 yellow should be the easiest to keep, as long as you can keep the nutrient low.
 
few things that you can do are:
 
over skimming 
less feeding 
more frequent water change 
macro algae 
mangrove  
less fish 
bio-pellets 
zeo-vit 
etc etc etc
 
or plumb your tank straight to the ocean.
 
I personally didn't change water for 4 months, and everything keeps their color well.  
		
	
		
		
		
		
			
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				150DD mix reef with 90 gal sump and 40gal frag tank
 
purple tang, sohal tang, yellow eye kole tang, fairy wrasse. cleaner wrasse, leopard wrasse, and misc fish.
 
GHL Mitras 6200HV X 2, MP40 X 2, MP60 X 1,  tunze 6095 X 2, Vertex RX6 calcium reactor, Bubble King SM250, Aquamaxx bio pellets reactor, Profilux 3
			  
		
		
		
		
	
		
		
	
	
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