This is my first post but I have been visiting the board for a while. I just filled this pool for the first time in January. Since the pool has warmed up to above 80 degrees I have been having trouble keeping FC above 1 ppm with my SWG. I have been running the pump at least 14 hours/day with the setting on the SWG at 80 out of a possible 100. I finally decided to add liquid chlorine yesterday. I turned off the SWG and started adding 10% liquid chlorine yesterday about noon. By dark (8:30 pm) I had added 1 gallon of liquid chlorine and the FC was only 4.5 ppm. I shut everything down and tested the FC this morning and it had dropped to 2.5 ppm. It appears I just need to shock the pool, but I wanted to make sure I wasn't missing something before I took the FC to 21 ppm. My test results from yesterday before adding the liquid chlorine were:
FC: 1.0, TC: 1.5, PH: 7.4, TA: 80, CYA: 60-70, Borates: 45 ppm, CH: 350, Salt: 3300 ppm.
Thanks for your help