I've been doing a shit-ton of reading on the interwebs about Calcium and Magnesium for plants(not specifically for the ladies). I've found a fairly large amount of folks using blackstrap and toasted egg shell powder diluted with water for cal-mag solution. Has anyone tried this for their girls? Cal-Mag isn't as expensive as some of the other nutes out there, but a bottle of blackstrap is like $2, and my household produces a dozen egg shells a week... Thoughts? I'm going to give it a test next tomato season... I don't mind sacrificing some of those for the test!