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Tank looks like its finally coming along!
Also something to keep in mind with testing phosphate on tanks with a large amount algae, you can test for low to zero phosphate on tanks because all the algae is sucking it up. It could be coming from a few places. Lets say your old rock was leeching phosphates, the amount of algae u had, along with the GFO and Refugium would suck that up and grow and you wouldn't know.
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