It shows on the Pool Calculator to get a shock with my CYA level of 60-70 I need to add something like 7.5 gallons of 6% bleach. Can that be right? That is a whole lot of bleach. ****, that will cost me like 30 or 40 bucks. I do have 'some' algae spots around the pool, but nothing a little elbow grease wont take care of but I think it is time to shock. Anyway, I guess I need to go buy a whole hack of alot of bleach huh?