I had posted last week about all of my levels being way off and I thought maybe I needed a new test kit. The forum agreed so I got one and I am still getting the craziest readings. The pool is absolutely sparkly and the water feels soft but the kids are developing a terrible rash on their skin. I have retested with the new test kit and the numbers are startling. Both chlorine levels are stating zero, even though I know its in there!The pH level is pale yellow so it must be well below six. The TA is testing about 10 to 20. I have been maintaining this pool for years using the TFP method and it has worked flawlessly. We have had a lot of rain over the last couple of months and I am wondering if there isn't something weird in the water? Also, I'm not sure if it is related but my filter has always ran at about 15 psi but now it is running about 22 to even after backwashing. My question is, where would you start troubleshooting?