Re: question about BBB
If you don't want to add borax and acid to get to 50 ppm borate in your pool there are commercial products such as Proteam Supreme Plus or Bioguard Optimizer Plus(a mixture of borax and boric acid) that are pH neutral and don't require the acid addition but they are a LOT more expen$ive! The choice is yours. Realize that borax is used for two distinct things:
1) To raise pH without raising total alkalinity much. Very little borax is needed to achieve this so you will not get the algaestatic and pH buffer benefits.
2) As an algaestat and pH buffer by adding 50 ppm. Because borax is alkaline this will cause the pH to go very high so the addition of acid is necessary to keep the pH the same. As an alternative you can just add boric acid (more expensive) but this will lower pH somewhat or use one of the proprietary products (a lot more expensive).
Hope this clears things up for you.
Retired pool store and commercial pool maintenance guy.
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