Calcium Hypochlorite?

[aylad]

I'll let the others comment on yellow out, but I will say there's nothing wrong with cal-hypo---until your calcium gets too high and you end up with milky water. While cal-hupo breaks down into calcium andchlorine, bleach breaks down into chlorine and salt water-- no unwanted chemicals. How much to use depends on your stabilizer level, volume of the pool, and whether you are shocking or just maintaining routine chlorine levels.

Seriously-- cal hypo has its place, in pools that need the calcium level raised. But in those that don't, bleach is a much better alternative.

Janet