We are new to the hot tub world and I'm having an issue with 2 members of family getting a rash after use. My wife an youngest (13 yrs) develop a rash after they are in the tub. Myself and others that have used the tub do not have any issues. It's nothing like the pictures ofn the web of bacteria infctions and such, it seems like a posion ivey rash. We use EZ Spa chemicals and my water does test are fine when when I take a sample to my dealer for a full test. I'm wondering if anybody else has this issue, as my dealers states it's hard to believe it's the chemicals causing this, but my wife and son are both sensitive to whateve ris in the water. My next thought is change my treatment chemicals to another type like Baquacil. Any help would be great!