I have a 280 gallon dream maker spa that I got up and running in late July ( after building a deck, running power etc). I use the spa about 5 times a week for an average of an hour each use. I developed a nasty rash that itches like crazy. If I stay out of the tub for a week the rash goes away. The tub has an ozonator. I have been using bromine tablets, or sometimes a chlorine powder that the spa dealer sold me. My PH has been kept in check which I check a couple times a week. I use Ez Spa Total care once a week. I have read that it may or may not contain PPMS which is a known skin irritant. My wife uses the tub as well as an ocassional guest and no one had had the issue I am having. I do not have a way to measure sanitize level so if someone can recommend one I think I need to be checking that. My other question is can someone tell me does EZ Spa Total care contain PPMS? Also could the rattle stick (sorry don't know what its called) that you place in the filer basket area contain Nickel or other possible metals I may be allergic to? I am going to drain and refill the tub soon in prep for winter and am hoping not to add anything back in that may be causing this miserable rash. Thank you in advance for any input.