So we recently got a hot tub, used, from some friends. I used spa marvel cleaner just as the instructions says for cleaning. Filled tub and added spa marvel treatment. Took sample to pool store and got readings...
TA 80
PH 7.8
Bromine 0.6
I was told we were good to go. First my daughter, 10, got the rash. A week later me and my wife get the rash. I checked the water today, one week after testing at store, with an Aqua Chem tester with the drops and got readings..
PH 7.2
Bromine 0.0
I am using 1" bromine tablets, and cleaning filter, once a week for a 300 gal hot tub.
Any help would be much appreciated. I am asking here because the pool store is closed for the holidays.