I have had my above ground for several years and never had this problem, run my filter 24-7, with a chlorine level around 28+ and water never completly cleared. I drained half at the beginning of year but still had a cya of about 90+, the pool store guy (been in it for 30 years) said thats probably not the problem, could be the sand need cleaning with a detergent. I finally cut the pump off and went on vacation and have a nice mess. Wanting to cure the problem and start again, willing to drain the whole pool at this point. I have the tf100 kit and kept a close eye on it for a week at 28+ but never cleared. Any suggestions?
I have been using Trichlor instead of the BBB method as of late but it contains no additives