I have a 6 month old Artesian Nevis spa which appears to have ozone and UV sanitizers installed since the lights for those are illuminated on the panel and there are little bubbles coming out from the footwell like the service tech at the dealer said there would be. I also have a Microsilk system which produces the tiny oxygen bubbles. When I got it, we filled according to instructions using a dichlor system. No issues and kept the chlorine pretty minimal, adding more after each use, since we always showered first and went in au natural. I had to go out of town for 3 months, so turned the heat down to 50 (although ambient temp was high enough to probably keep it at 65 at least) and switched to bromine floater with the nature 2 stick, which seemed to keep things nice the whole time. Drained and cleaned it, soaked the filters (which still looked brand new) in vinegar and water overnight, refilled and decided to try the Spa Frog system. I used the start up packet which came with the spa frog kit (PH and Alk and hardness all good) and dialed the bromine to where it was suggested. The next day, no bromine reading, so I figured I would stick the floater with bromine tabs in the tub to help it out since I had read about others needing to do this. Left it for a couple of hours with the floater open about an inch and took a soak. I don't remember testing the water before I got in, so i'm guessing I didn't! After soaking for 20 minutes (my max time) I did my usual routine of emptying my bladder and showering. Two things happened. My eyes burned like crazy in the shower once water hit them. I thought maybe I had gotten shampoo in them, but this was really painful and took ages to wash out with water and soothing eye drops. A few minutes later, my whole urinary tract was irritated and painful, radiating to my lower back. Saw the doctor since I was worried about a possible UTI, but nope. Just irritation and inflammation. So I am wondering what it is that triggered this. I don't seem to have a bacteria problem since the bromine levels seem to stay up well over two days without the floater in the tub and no use. I had used a bromine floater system in my last hot tub with no problems. Could it have been the start up packet chemicals that came with the Spa Frog? I didn't add any MPS until after I had gotten in that first time, so that wasn't it. Do people have a reaction to the silver in the frog system sometimes? I wear silver jewelry with no problems. Or was it likely that the bromine level was just too high after two hours of the floater plus the frog? I did leave the floaters in the tub with me for about 10 minutes, since they stayed in their own corner, but I know i should have probably taken them out. I was thinking about flushing, draining and refilling the tub and switching back to dichlor, but thought I would get some feedback before going through all that in case it's just chemicals that needed to burn off a bit. Thoughts?? Thanks! I am dying to get back in the spa but afraid to until I have some answers and a decision.