You'll have to read the cal-hypo label to see how much it will increase the FC in your pool volume, should be a simple equation. I can vouch that shocking to FC of 20 is about right for CYA 90. I just had to do that w/ my pool and it worked quickly. I know bleach tends to raise pH and I would guess the cal-hypo would have the same effect. I'm sure some of the moderators could give you better info on what to do with your pH while in process. Your TA looks low to me, too. Good luck!