Cool, it worked. This is my second batch, Mexicana ATL7, monoculture isolated, G2Ged from master on 5/17/2015, so they are about three months old now! Wow, I didn't think they were that old yet. My babies are growing up so fast...
Picture 1: The drawer full of goodies. Note that after seeing how most of the stones were forming in the bottom of the first batch, I decided to do something no one had mentioned trying before--laying them on their side to increase the bottom surface area. Kind of like how RogerRabbit said that laying bags on their sides, keeping the grain about two inches thick, tended to produce the best results. I noticed while harvesting my first batch, that nothing grows in the thick middle area.
Picture 2: Tried to give you an inside view, to show how it's a big mass of white, which was unlike my first grow. It didn't get like this. (Was Mex A though, maybe that's why.) This happened very quickly, it spread itself like fluffernutter all over the place in about a week. Unfortunately, the camera could not see through the glass no matter how I tried to take this one. (It is quite clear in person, I can see down into it and see the hills and valleys, etc.)
Picture 3: Side view, showing the noticable stone formations towards the bottom, and the condensation hanging from the top. I try not to disturb them, and cause the water to run down onto the colonization, because I don't think they like direct contact with that much water. I open and close the drawer very slowly, lol.
Picture 4: Jar bottom view (not really the bottom). Note the stone formation to the middle left. Looks just like a walnut that got stuck in the jar.
There is some considerable darkening that stretches thinly towards the top, which I am wondering about. There is much more in other jars, but I didn't take close ups of those because it blocks the view inside. It's the same color as stone growth, but can't be, because it's very thin. Maybe it's a structure designed to funnel moisture from the top down to the colonization?