I have a 4 year old Doughboy Palm Shore 16 x 32 and the top rails have started rusting. So…..I went to the dealer to check on it and see if warranty may help pay for the rails. First question the owner asked was what is my CH and TA. I told her that the CH was 50 and the TA was 70 and they wanted to know if their store was doing the testing, which I told her no, I do my own testing. She then wanted to know what kind of test kit I was using and I told her I use a TFT-100. Of course, she made no comment and said warranty wouldn’t cover because of low TA and low CH. She said the combination of the low TA and low CH was causing the rust….. I didn’t think CH was that important in a vinyl pool. Pool experts chime in and let me know what I’m doing wrong?
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