dwest
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Perhaps. It’s certainly hard to pinpoint a true cause. Higher nitrates with low phosphates are often a trigger. And you were certainly pushing zero phosphates. Did you use GFO or other phosphate reducers?Yea I use a salifert test kit for Nitrate and a Hanna ULR for my phosphates, and I have 15ppm Nitrates and 0.009 for phosphates which isnt to far from 0.01 so is that perhaps not my issue?