I'm working on adding Borax to my spreadsheet which already calculates the pH and alkalinity changes when adding other chemicals and also calculates how much chemical to add to get pH or alkalinity changes. I'm also in contact with Michael Smith, the creator of BleachCalc, to see if some computations could be added to his program since his U.I. is straightforward while my spreadsheet is not for novices.

After I add the Borax portion to the spreadsheet, I'll post an update in the Pool Water Chemistry thread in The China Shop forum. Also keep in mind that Michael reported problems with the reverse calculation of the spreadsheet not working on a PC (damn Microsoft).

Richard