Po4 media reduction in AIO.

[Reef.]

Anyone with an aio know the best placement for po4 media (phosguard) ?
I have mine in the fist chamber, at the top under the floss, I have changed it a few times now but can’t get it below .1, just wondering if there is a better method as the amount I have used should have reduced the lvl, the po4 lvl has only just got to .1 over a couple of weeks so thought it would be an easier fix.

 

[T-J]

Anyone with an aio know the best placement for po4 media (phosguard) ?
I have mine in the fist chamber, at the top under the floss, I have changed it a few times now but can’t get it below .1, just wondering if there is a better method as the amount I have used should have reduced the lvl, the po4 lvl has only just got to .1 over a couple of weeks so thought it would be an easier fix.

My 40 is an AIO, and I purchased a small media reactor from BRS. I have it mounted on the wall next to the tank. I have the pump and return in the last chamber. I put a mix of GFO and Carbon in it. Works like a charm!
In my 120, I have a two chambered media reactor.