jhant

What you are describing sounds like what happened to me. I used a product called Shock Rite to condition the water. I was using bromine tabs for sterilization of the water. I discovered that I was breaking out in a massive rash and scratching myself to bits shortly after being in the spa. Turns out that the Shock Rite contains a chemical called potassium peroxymonosulfate. This is also accumulative and does not disperse like chlorine or bromine do. I drained the spa, refilled, dumped in the bromine tab and a handful of Bicarb of soda and the problem immediately went away. I dumped the ShockRite so I'd never be tempted to use it again. Try this and see how you go.