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- Feb 26, 2020
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I was using tropic marin phosphate tester which was at zero. So to make sure I bought a hanna phosphate url tester and confirmed 0 phosphates. If I have green macro "lettuce" in my refugium and some hair algae on the outside of my skimmer I do have some phosphates right. Their just being used up? I don't really want to dose anything, I feed heavy already