I'm stumped on why my PH keeps rising from 7.4 to 7.8!!! Every week, I have been adding 15-17oz (Muriatic Acid) to bring the PH back down to 7.4 and what do ya know, we never stay put!!! Hopefully someone here can help me understand why this keeps happening. I use around 50oz. of bleach every evening after I run my water test.