Quote Originally Posted by Carolina View Post
That's not a bad idea. I always need to supplement with calcium every now and again to keep my levels up. Does it have cyanuric acid added as tri-chlor does?
Nope. CYA is unavoidable with Tri-Chlor and Di-Chlor because the chemistry of them is such that as they dissolve CYA is released. But Cal-Hypo doesn't have that problem. Be careful, though--Cal-Hypo is the most volatile of the chlorines.

Cal-hypo's side effects are it adds calcium, can raise pH, and sometimes can make your water go milky (rarely, and easily fixed). No CYA at all.