Lazarus

New hot tub owner (male) - advised to use non-chlorine shock once a week. Developed awful itchy rash on my back despite chemical balance being consistently correct. Interestingly, my wife did not develop any reaction. Read about the PPMS potential for allergy so drained, cleaned and flushed the tub etc. Now only using chlorine shock in minimal doses as winter use of tub is minimal. NO RASH!