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Using TF-100 for several years now, with refills occasionally. Recently, in trying to test chlorine, no amount of drops will turn the water from pink to clear. Do both the R-0003 and R-0870 eventually expire? Thanks.

After a LONG month of elevated CYA, algae, 3 occasions of draining/refilling then full blown BBB + OCLT, I'm just astounded by how awesome the pool looks. Even my wife commented that she hadn't seen the pool look the color it is now is in a long, long time. She still thinks I'm obsessed by my...

I'm slowly getting smarter every day on this. Have my test kit, have been SLAM-ing, water looking 1000% better in last several days, but still learning,... After you've achieved the critical criteria of CC is 0.5 or lower; you pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm...

Have made lots of errors this year in my pool. Too embarrassed to list here. Assuming draining some of my pool to basically start the repair process, what next? The high CYA I believe was caused by the "low cost" shock I've used all year. Results in lots of algae, followed by really bad...