Testing for phosphates is really taboo. If you have algae you have phosphates. Your test kit may say you have lots of phosphates or none at all, but this is because as the algae grows it eats up the phosphates, and your water column may read 0, but the algae is still holding it. Read the Nuisance Algae Guide in my signature. It should answer all your questions.
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~ Mindy
SPS fanatic.
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