I would just look for CYA that has cyanuric acid (or isocyanuric acid) only. What you bought also has baking soda in it which will also raise your alk. Your alk is a little low and could stand to come up some but I have no way to know how much. The pool shock that is 12.5% sodium hypochlorite is fine. That is the same thing as bleach but just at at a higher concentration, and that would be a good price for it.