The only real downside to using calcium hypochlorite is that your calcium level will eventually get high, and when you combine that with high pH and TA it causes cloudiness in the pool (or milk, depending on how high the Ca gets.

hth used to make a cal-hypo capsule enclosed in plastic but open at both ends, which worked really well, but the new cal-hypo pucks are pretty much garbage--they turn to mush within a couple of days, so I would stick with the powdered form or try to find the capsules if you're going to use it on a regular basis.

Janet