Hello, I have a 7200 gallon inground gunite pool with a saltwater generator. Current readings are Cl above 5.0, pH above 8.2, and TA about 320. After finding the chlorine level so high I turned off the saltwater generator, then retested a couple of days later with no improvement. I drained half of the water out of the pool and refilled but the chlorine level is still above 5.0. I have added about a gallon of muriatic acid over a couple of days and it doesn't seem to be touching the TA. Should I add sodium thiosulfate to bring the chlorine level down and just keep adding more muriatic acid? Could my cell be bad and therefore causing the generator to make more chlorine than necessary? What do I do next?