To be honest I get impatient and use the liquid CYA occasionally. The only thing to remember about it is (besides the higher cost) is that it settles at the bottom of the jug something fierce. You need to really shake it up, add water and keep emptying that jug to make sure you get all of it out of there. Plan on using the entire jug. I imagine with your pool it will add about 25ppm/gallon of CYA.
Maddie
Maddie