Bleach and liquid chlorine are the same thing in different concentrations.

The Rule of Thumb:
1 Gallon of bleach/LC will add EXACTLY its concentration to 10,000 gallons of water.

So if you add 1 gallon of 6% bleach to 10,000 gallons of water, it will add 6ppm to your FC.

If you double the water, you get half the effect.

Double the concentration (to 12%) and you get twice the effect. (12% adds 12ppm to 10,000 gallons).

Figure accordingly to get to your target FC level.