I was able to find cal hypo. Questions before I use it.

Pool still green & not clear. Also found small possum in skimmer outlet. If I understand correctly we don't want to use dichlor right now to keep it balanced, that's why we need cal hypo?

We're using 12% liquid chlorine, but the cal hypo will clear it faster?

Using the Barracuda is not harmful is it?

Thank you.