50 ppm Borax

[waterbear]

Hi,
What's the advantage to having Borax level at 50ppm? I noticed it on Mike's calculator, and on the "Alex" printout from the pool store (listed as Optimizer +) My water showed 20 ppm.
It is supposed to be algaestatic (jury still out on this) and helps to buffer the water and keep the pH more stable (most likely true)
I had them test since I was waiting on my CYA refill for my PS233. Also what is the Adjusted Akalinity vs TA
When you put CYA in the pool it forms a secondary buffer system of cyauric acid and cyanurates. this will test as total alkalinity but it is not part of the carbonic acid/bicarbonte/ carbonate buffer system that is what we are wanting to measure when we test TA. There is a mathamatical correction that is done to the TA reading based on the pH and the ppm CYA in the water. The ajusted TA is lower than the tested TA. The jury is still out on whether this correction is of any value in most circumstances.
? Pool is crystal clear using BBB.
Thanks,
Henry

Hope this helps.

[Henry3]

Thanks Evan,
I knew someone here would know.
Henry