How much should GFO lower PO4?

[saltyhog]

I turned my GFO off for a while because I was carbon dosing for nitrates and my PO4 was undetectable. I guess I turned it off a little too long because now my PO4 is 0.18. Restarted my GFO reactor and just for grins checked the effluent from the reactor for PO4 and got 0.08.

Is that a reasonable amount of reduction or should it be better than that?

 

[Randy Holmes-Farley Verified Community Expert]

That is reasonable. As long as it is lower than the tank, it is not depleted.