Just to clarify, you need to add 7.5 gallons of bleach, then test and add more at least 2-3 times daily,but as often as possible, to get back up to the 25-30 ppm range. The more consistent you are about keeping it above the 25 ppm level, the faster it will clear. If you let it yo-yo up and down, you're just wasting time, money, and bleach. When you figure out how many ppm you need to add to get back above 25, that's how many quarts of bleach you need--one quart will raise your Cl by 1 ppm. And yes, you need to keep it there until you're not losing any chlorine at night, the water is clear, and the CC is 0.5 or less.

Keep the pump running 24/7 while this is going on, and keep an eye on your filter pressure. You'll need to clean the cartridges as they gunk up with the dead algae. Brushing the pool daily will help, as well.

Good luck, and keep us posted on how it's going!!

Janet