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Old 08-29-2012, 10:30 PM
George George is offline
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Hanna 713 PO4 checker(I assume that's the one you have) has an accuracy of +(-)0.04ppm. So your water out of the reactor could be 0ppm or 0.05 ppm. As long as water out of the reactor has a lower PO4 level than the tank water, then your GFO is still good.

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Originally Posted by Enigma View Post
Hmm. 0.01 ppm out of the reactor. Is it possible to see 0 out of it?

This Hanna checker is very nice and easy to use.
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