Considering that PoolSolutions is also my site (look at the logo at top!), it's probably OK to mention it.

And yes, baking soda AKA sodium bicarbonate AKA sodium hydrogen carbonate AKA sodium acid carbonate is EXACTLY the same thing as Alk+ AKA Alkalinity Increaser AKA etc. The only difference is the food grade is not only cheaper, it's also a little more pure!

PoolDoc

PS. I don't even ban people for mentioning TroubleFreePool.com . . . and that's NOT my site.