- Joined
- Feb 12, 2017
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So I just got a new frag tank up and running the last 2 days. No live rock or fish and only a bright Wells bio brick for filtration is planned. I added microbacter7 yesterday. Today I tested phos with my Hanna checker and it shows 11ppm??? My ro filters and di are only a couple months old and shouldn’t need replaced yet. Where could these phosphates be coming from?