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					Originally Posted by  Delphinus
					 
				 
				Hey Chin - not worried about the substrate leaching phosphate? I'd be interested to see what kind of PO4 the reactor is emitting. 
  
Having said that, I haven't tested my reactor output though because ignorance is bliss!! 
			
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 Currently does any CA media guarantee no leaching of phosphate? Last I read is that ALL calcium media leaches phosphates. If there is "no phosphate" media, I'll switch to that media. 
But otherwise, I can't personally see the difference between crushed coral brand A and crushed coral brand B or crushed coral brand C.
 
I am actually in the planning phase of making a closed loop phoshate remover out of a Phosban reactor for the efluent of a calcium reactor.