TA-Total Alkalinity

TA is a measure of the ability of a solution to neutralize hydrogen ions, which is the measure of water's resistance to change in pH.
TA is the result of alkaline materials including carbonates, bicarbonates and hydroxides.
If total alkalinity is too low the pH may drop rapidly, causing etching and corrosion.
If TA is too high a high pH often occurs causing problems such as; cloudy water, decreased disinfectant effectiveness, scale formation and filter problems.
For the typical swimming pool, TA should be maintained in the range of 90 to 140 ppm.
If you have a SWG, or you commonly run water features the TA can be kept on the low side, between 60 and 80.
Sodium bicarbonate also known as baking soda is used to raise the total alkalinity.