Making sense of Phosphate readings

[Wheelman76]

Originally Posted by Magickiwi

+1 I think those are pretty good #'s for Hanna testers. They are only advertised +/-5% accurate and I would be very surprised if they are really that accurate.

Who knows how accurate the checkers really are , however keep in mind that the regular checker is +\-5% ppm , whereas the ultra low range phosphorous checker is +\-5% ppb which is more accurate.

[Myka]

I think people rely a bit too heavily on nitrate and phosphate test results. I think we have a tendency to try to measure and control as many variables as possible, and in this blinding determination we fail to really look at the tank.

You say you filled up the reactor - exactly how much RowaPhos did you use? RowaPhos is quite aggressive. In my experience, too much GFO is much more detrimental than too little (or none). I hope you are adding your equipment back cautiously and "gently".