Is the formentioned stuff the same as calcium hypochlorite ?

I normally use one pound of shock (calcium hypochlorite) in the one pound bags for convenience (15,000 gal pool).

I was at target and they were clearing out the formentioned chemical for 1.25/pound. The label states, 56% available chlorine.

Anyway, is the stuff acceptable to use in a normal chlorinated in-ground pool (GUNITE) ? Any side effects in using this stuff vs bleach vs regular shock (cal. hypo.) ???

Thanks,

-d