Need help with PO

[bucfan]

Been battling high PO forever. So this past week I tried a regimen of PhosphateE daily to bring it down. Started at 0.37 brought it down to 0.08 over 7 days. Now it's back up to 0.27. So where is all this PO coming from? I have not changed my feeding and don’t feed heavy. Using a Hanna meter to measure.

 

[Ultra Aquatics]

It get absorbed into rock and sand. As you reduce it more will leach out. Eventually you will reach an equilibrium.