Anyway, I searched and microbacter 7 had pretty good reviews and it advertises to reduce nitrate and phosphate, so I gave it shot. since 4/5, I mixed a cup of tank water and slowly dosed 25ml in the low flow area of the sump with the skimmer off for 4 hours. not that my phosphate didn’t decrease by increased a bit. Nothing positive that I can ... More @Wikipedia
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