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Good day all, Can you please tell me if a safe swimming range for FC would be between 4-12ppm? Here is the reason I ask... The pool store tells me my CYA is at 80. My (inexperienced) testing with TFT-100 shows CYA in the 35-50 range and DEFINATELY NOT 80. I shocked the pool a few weeks back to...

Hello, I'm new to TFP and I'd just like to add my thanks to you all for a great and much needed website. I bought my first home 10 years ago and yes, it came with a pool. I can only say that I wish I had come across this website 10 years ago. Anyways, on to the fun! Today I tried the TF-100...