does anyone have any experience with using calcium chloride as an alternative to kalk. I've heard this a more concentraded form of calcium mainly used in construction and deicing roads. Anyway there's a place here in town (S.A.) by the name of UNIVAR (www.univarusa.com) they sell just about any kind of chemical, powder, carbon...you get the idea.
Well I can get a 50lb bag of calcium chloride (flake\pellet) for $17, just don't know how well it will work as a kalk. substitute. If I'm not mistaken, I think they said this stuff is 80% calcium chloride and the rest is potassium chloride and something else.