Is the pool still green now? As you kill off the algae, it will go from green to clearer but cloudy and bluish until clearing up afterwards.

Good read here.
http://www.poolforum.com/pf2/showthr...You-have-ALGAE!!!

To compute the amount of bleach/liquid chlorine this calculator is excellent.
http://www.poolforum.com/pf2/showthr...18-bleach-calc

Your ph at 7.4 is good, so I don't see why they want you to add 1/2 gallon of acid as that will reduce the ph, and makes no sense. Stabilizer can come after you get the water cleared up.

The experts will way in, but for now, if the pool is not clear, you need to get the chlorine level way up above 10 ppm and keep it there until the water is clear. Chlorine is used up as algae is killed, so you need to check the chlorine level a couple of times a day and add bleach as needed to keep the level up.

When you shock and the free chlorine goes to zero, it gives the algae a chance to bounce back and you lose ground.