Hello all. I have a 15,000 gallon gunite pool with a Intellichlor SWG IC40.....I run the pump about 5 hours a day. I have my ouput set around 25%....salt level reads 3000. CYA is about 50. FC is 1.6-2. TA is 110. I keep adding muriatic acid to my pool but the pH still comes back up....i have a...