I need help! (please). I am about 5 months in as a new owner of a jacuzzi swim spa. All of a sudden my Total and free Chlorine were off the chart high I tested with a different test strip and Total was off the chart high but FC normal.. I started reading here about CYA. Only the new test strip had CYA and it showed it was at zero. Sooooo, I bought Cyanuric acid and started adding it. ..... nothing. Did not raise the CYA and did not change the chlorine profiles with either test strips. I ordered the TF Pro test kit. it arrived yesterday. I tested my CYA and it is well over 100 (meaning it does not even get half way up to the 100 mark). I have to assume that the test strips were bad/not working when it read that CYA was 0? Now I am totally at a loss. I assume I need to drain my spa, but that is not easy. I'm in NH. It's cold. A complete refill is not really feasible. I could probably partially drain and fill from my well if I have to but that will introduce high iron and manganese creating a whole new set of problems. I'm losing sleep over this. I hope I didn't totally trash my new swim spa.