Borax or Arm & Hammer???

[mariner09]

The A&H I have is baking soda or sodium bicarb. I'll keep that for raising both when I need it.

I also have Borax and will add 1/2 a pound this morning to see what it does. I haven't put in CYA yet, but that will go in after the Borax this morning and then I should be on my way.

TA seems good, pH needs a slight bump, so that seems to be the way to go. Seems like BleachCalc may be labelled wrong because in the pH section it impicitly states that the numbers are not for Borax use but for Soda Ash in regards to raising pH.

So, if Soda Ash is twice as potent for pH than Borax, would it be safe to assume that if I follow BleachCalc then I would need twice the amount of Borax for a comparative rise to pH from Soda Ash?