I developed a skin rash after being in my salt water pool yesterday. I took a water sample to the pool store and couldn't find an obvious reason for the problem based on their normal guidelines. Free chlorine 1.2, alkalinity 55, ph 7.8, cya 50. From this forum and pool school I realize I can't trust pool store results and should be looking at different "normal" ranges for the test results. I've ordered a test kit . When received, is there a likely cause for the irritation that I should be looking at first or just start by adjusting CYA , then Chlorine, then alkalinity , then pH as mentioned in the water balance for SWGs article ?