We've had our tub for almost a year now - have gone through adjustment issues - made the switch from bromine to chlorine (turns out I am allergic to bromine plus we had major issues just getting our onzen system to even work) All has been going well BUT we've been having issues with the PH and TA dropping to the point they are almost disappearing. On the advice of our guy from Arctic Spa's due to my sensitive skin we are trying to use as few chemicals as possible...... we've used baking soda to raise the PH and TA, muriatic(sp) acid to lower PH and TA (only have to do that when first re-filled) then scale free once a month and a floater with chlorine pucks in it.
I check the tub levels about once a week to once every 10 days - every time I do it seems the PH and TA have disappeared. What am I doing wrong that's causing this? There are 4 of us in the family and we use the tub pretty much every Fri/Sat/Sun night plus at least once during the week.