I have been measuring my phosphate with the Hannah ULS because my phosphate has been low. I have been dosing and feeding more, and I can get it around .04ppm when I test it before bed, then in the morning it’s back down to 0.00. Is that a large amount of consumption by corals or is it normal? My tank is a 29g with about 12 corals, most are sps frags.
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