I just had the 35,000 gallon pool replastered, new tile and brick and new water brought in. What is the first item to stabilize in pool--- chlorine, PH, or alkalinity?? Have added stabilizer, chlorine, ph down, muriatic acid, and my ph reading is 8.5; chlorine is showing no detail at all or zero. I had also added Metal Out (sequestering agent) My alkalinity reading is 70. Got any ideas???