Your dosing alk
and cal? Dose less than what they recommend test the following day and keep records. All tanks are different mine I go 40ml of both after wc
and then less later in week to keep it stable.as you keep records you will see how much affects the reading and you can adjust then test weekly. It takes awhile to learn how much of each your corals and coralline algae is using but you will figure it out.sometimes more of one is needed to keep levels in recommended area. Google randy Holmes chemistry alk
and cal good info. Hope this helps.