Best 'Organic' Phosphate test

sen5241b

Reef enthusiast
I read somewhere that your really want to test for organic phosphate (and not inorganic phosphates) in your tank. Is that right and what is the best phosphate test? I've generally been using API tests.
 
The kits you buy only test for ortho-phosphate(inorganic).They dont pick up the organic kind that fish and coral produce.For that,I think a photometer is needed.
 
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