Thank you waterbear. I'm hoping thru this forum I can find a system that will work for me in the tub. I was not sure how to start so I thought I would eliminate one quick theory. [ tds] carld you hit the nail right on the head. I do have a problem. It's called a 2"x3" nasty spot just above my left ankle.[ chem. burn] It is related to just our spa. I can swim in the pool with no problems. originally sodium dichloro-s-triazinetrione, dihydrate now were on the simple bbb system. As far as our spa we use a two step program with bromine. [Artic brand] Might as well start at the beginning. First got the tub I noticed some itching right off the bat at this location. Being a newbie our first fill of water did not take long for us to distroy. The itching continued even with new water. Was told tds were causing my problem. [ after multi. drains and refills the problem is still there and much worse] I'm convinced it's related to the bromine. Has anybody else experienced anything like this???? For the record nobody else is effected by the water not family or friends and only this one spot. I can climb in and soak with no problems except for this lone spot?????? We had a suggestion just to add the proper amount of sodium bromide at fillup and use bleach to shock??? Can we just change the water and go with the b,b,b, system without any bromine??? Maybe other options on what to use for a sanitizer???? The dealers have told me that using chlor. in the spa is much harsher than bromine???? suggestion, help,advice????? waterbear please chime in as we have had this conversation many times. steve Fyi:: I do hope someday this site has a hot tub/spa section.