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I became a BBB user since July 1, and use 3 lb shocks and 2 tablet during past two months. the CYA level tested by a pool store was 100 ppm on July 4. my CYA test result using TF-100 was 40-50 on July 8. The CYA level keeps the same range of 40-50 using TF-100. I went to the pool store to...

I am the new owner of swimming pool for four and half months. The pool was excellent when we moved. The FC was 4 ppm, only pH was high around 8.2. I added MA to reduce pH, while pH was not lowered due to high alkalinity. I found TFP website in the early of July and knew the BBB method. I...