Quote:
Originally Posted by Amadod2
i dont see anywhere on the instructions about dividing the number by three?? my hanna checker is a HI 713 Phosphate low range?? also currently i have no algee
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I have that Hanna checker, and the readout is the correct ppm for P04. Just make sure you follow all the directions incl pressing and holding the button after add C2, until the 3 min counter shows.
I don't like my P04 above 0.10 for SPS. Zero or near zero is best. I use GFO to keep my phosphates low. If you have high phosphates, >1.0, and difficulty getting it down with just GFO, then use Foz Down to bring it down (again follow directions exactly). Then maintain with GFO.