Thanks Ben. I won't bother with the calcium hardness increaser or the algae control.

If one gallon does 6500 gallons, I would need to use 2 gallons since the pool volume is about 13,600 gallons. 24' x 52" (48" filled to 3/4 on skimmer opening), correct? How many days do you think I need to add the bleach? I have 5 or 6 bags of shock still on hand from last year. Would that be an equivalent? Might as well use up what I have if it applies.

thanks
Tom