I decided to raise my pH with Soda and found that Jason's Pool Calculator recommends using Washing Soda, which is Sodium Carbonate. But in the section for Total Alkalinity, the Pool Calculator recommends using Baking Soda, which is Sodium Bicarbonate.
I tried searching this forum for an explanation of how each affects pool chemistry, similarities and differences, but didn't find anything.
The Pool Calculator and its associated text page indicates, I think, that Baking Soda doesn't increase pH as much as Washing Soda. But both raise TA. I suspect that both also raise the salt level a little (from the Sodium).
Would someone please explain more fully why I should use one over the other and when?