so my po4 was real high last week when i tested so i bought a bigger BRS reactor with there good GFO. its been running for 5 days now and its down to 0.5 from 1.0 where it was. What i want to know is if it takes this long to drop, or if i have some other problem. i tested for everything because i noticed that some cheato was disappearing and looked to be dieing. everything else in the tank looks great except my HUGE bright yellow polyp rock! they havent opened in days.