I'm just getting started with my first pool and intend to follow the BBB method. I searched around but haven't found anyone talking about purchasing baking soda used for soda blasters instead of arm & hammer boxes at the grocery store. I happen to have a soda blaster and I purchase 30lb bags for about $30 from harbor freight. As far as I know, this is straight up sodium bicarbonate, so it seems to me like it should be fine. I wouldn't bake a cake with it, but is there any reason not to use it in my pool?