I wouldn't worry about the TA and pH right now. pH is fine where it is, and TA isn't going to be critical right now, as much as clearing up the algae is. Here's how to force your kit to read higher chlorine readings than it was designed to....
http://www.poolsolutions.com/gd/how-...d-testkit.html

If your pool is 24' diameter, and 48" from floor to water level, then I'm estimating about 13,500 gallons. Do I have the dimensions right? In 13,500 gallons, each 1 gallon of 6% bleach you add is going to raise your FC by 4.4 ppm. Each 3.5 cups of bleach will raise your FC by 1 ppm, so you can use those as a reference point. You need to get it up to 15-18 ppm and hold it there by testing as often as possible and adding whatever amount of bleach you need to get back up over the 15 ppm mark, until you can measure at sundown and then again in the morning before the sun hits the pool, and not lose more than 1 ppm of chlorine in that time. When you get to that point, and the pool has cleared up, then you can let your chlorine drift back down--but only to the 3-6 ppm range. Any lower than that, and you're going to have algae growing. If you can, brush the pool after your chlorine additions, and keep your filter running 24/7 during the process, cleaning the filter as your pressure indicates.

Janet