You can use baking Soda. It has the least effect on pH when raising TA. The lower your pH is however, the greater the chance you will see on it with Baking Soda.
No, that is not too low assuming your spa/hot-tub is not plaster and does not have tile with grout exposed to the water (most hot tubs are acrylic so saturation of the water with calcium carbonate is not needed).
For additional pH buffering we suggest using 50 ppm borates, most easily added by getting boric acid from Duda Diesel or The Chemistry Store. Did you read the sticky on How do I use Chlorine in my Spa (or pool)? assuming you are using chlorine (there's a separate sticky if you are using bromine).
Thanks. I left it along and I will check into borates. I found the chlorine post very very helpful. The frustrating part is the test strips don't agree with each other. I did get the Taylor test kit and those readings are so different than the test strips too
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!