Quote:
Originally Posted by fishkeeprian
The tank water read 105 bbp with = 0.322ppm and the water directly out of the reactor read 3 bbp = 0.009ppm so I assume I don't need to worry about changing it until it's nearer the tank ppm?
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That's correct.
The media calculators probably can come very close to predicting what you'll need over time, but the live rock might be leaching phosphate, as well, and I'd go slowly, in any case.