So my phos is registering .16-.08 and hair algea still there abit. bout 1/4 inch now. im about to change my media in my reactor but unsure if this range is too high still. i want to shoot for 0 but my tank just seems to still want to hold at that even after water changes and the use of red seas no3po4x. nitrates 0 but phos still a pain. any suggestions on good media besides ferric oxide. put cheato in sump to try and help now.