Hey, everyone. Maybe one of the chemistry wizards here can help me out.
I have a 450gal spa with an ozonator. I sanitize it with 6% bleach. I've also added about 30ppm CYA and 50ppm borates when I first filled up.
I originally balanced the water to a TA of 80 per the booklet that came with the Taylor test kit. But my PH would drift up like crazy, requiring 1-2 oz of dry acid every week to bring down to normal.
Then I tried a TA of 40 based on info on forums, but PH would still drift sky high by the end of the week.
Then I decided to not add baking soda anymore and let the dry acid bring TA down. TA eventually dropped to about15ppm and my PH has been stable for the past two weeks.
Does this indicate a problem? Is it bad to keep the TA so low? AFAIK, TA's sole purpose is to keep PH steady. Is there any other reason why I should try to balance it higher? (scaling, etc?). I'd love to be able to just keep it at 15 and be done with having to dump dry acid in there every weekend.