Wow! We've sorta' hijacked the thread but to clarify a little:

1 lb of Cal Hypo will raise Cl 8ppm in a 10k pool

1 gal of 6% bleach will raise the same pool 6ppm

With bleach, you get almost nothing unwanted except a little salt

With Cal Hypo, you'll add a fairly good amount of Calcium which you may or may not want.