For someone who has never tried making jelly before, I have never heard of calcium water before. Can you tell me more about this?
Really glad you made this detailed post. Hope you get to reprise it again in the future if you plan to make more jam recipes. I think mint, anise, and lime would make good jam flavors. Every time I cut lime leaves on my bonsai trees, I'm always wishing I could use the scented juices inside the leaves for something edible.
I use Pomona pectin (it's locally made) and their site's video probably explains it better than I can..
http://www.pomonapectin.com/learn/