So, I'm purusing the laundry section at Wal-Mart and grab a box of Borax and then also see this 4lb box of Arm & Hammer. From what I've seen here, you use Borax to raise pH and A&H to raise Alkalinity. What's interesting is that on the A&H box, they advertise it's use in pools to raise pH and Alk. If this is the case, is it safe to assume that now you can use one or the other for the same thing?

My line of questioning for this is that I just finished converting from Bacquacil and my Alk currently measures at 140. My pH is 7.1. This 4 lb box of A&H I have says it's Sodium BiCarb and not Sodium Carb, will this change what it's use is? I guess I just want to make sure I do the right thing...