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Just scraped this itsy bit of gunk off the screen. This is 3mo worth, although right after I noticed there were some clumps in the sump.
I think it's low nutrients cuz my nitrate test kit was reading 10ppm for months and I got a new one which told me flat out 0 every time. Phosphate 0.25ish.
Been feeding heavily last couple weeks and got the nitrate up to 5, and saw some slight improvement in terms of growth until this!
Any recommendations? Might I need to get a fertilizer or something? ICP test results are sent out to see about trace elements, awaiting those.
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