Help!! I don't know who to believe - Chlorine Lock?

[CarlD]

The way I worked the math was with a proportion. If .5 teaspoons effectively chlorinates 1 gallon of pool water, then 12000 teaspoons should effectively chlorinate 24000 gallons. Converting 12000 teaspoons to gallons gives me 15.625 gallons of bleach. Am I correct? So will I be adding 4 gallons a night for about 4 nights?

I'm not sure how you go there, but ultimately the calculation is correct.

Here's the formula you need:
(1,000,000/pool size) * concentration of bleach * # gals bleach = FC added

or, in your case, using 6% bleach

(1,000,000/24,000) * 0.06 * 4 gallons=9.99ppm of free chlorine added per night.

But you cannot be sure with that, as Ben says. You must still be testing because chlorine will be consumed.

For a 24,000 gal pool, one gallon of 6% bleach adds 2.5ppm of FC.