No Flow to GFO Reactor

[jordsyke]

I am just wondering if it is alright for me to just cut off flow to GFO Reactor for now without removing GFO?

I currently run biopellets and my phosphate reading is really low(0.04) but my nitrate level is 2.5 (Salifert). I know that there has to be phosphates for biopellets to remove nitrates (1:16). So cutting of flow to GFO will increase me to the phophate level I am looking for, but I want to slowly bring the GFO back online once this happens.