How much liquid pool shock should I use in a 12k gal pool??

[Booter]

12,500 gallons=>9.6 PF
10% shock => approx 0.8 lbs chlorine (gas equivalent)
0.8 x 9.6 = 7.7 ppm

2 questions:
1. What is PF?
2. Is 7.7 ppm the chlorine that the 1 gallon of 10% sodium hypochlorite will add to my 12,500 gallon pool?

[PoolDoc]

2 questions:

1. What is PF?
2. Is 7.7 ppm the chlorine that the 1 gallon of 10% sodium hypochlorite will add to my 12,500 gallon pool?

1. PF is the ratio between your pool and a pool with 1,000,000 lbs of water (~120,000 gallons). The calculation of the dose effect on a pool is:

   PF x %Concentration x Pounds

2. Yes. 1 gallon of 10% bleach is ~ 0.8 lbs of 100% chlorine equivalent, and will add 7.7 ppm of chlorine to a pool with a PF of 9.6.

For example, with 2 lbs of dichlor, the calc would be

9.6 x 55% x 2 = 10.5 ppm FC
. . . and . . .
9.6 x 50% x 2 = 9.6 ppm CYA