I just incorporated the rock wool into several different plants where I've been struggling with dry line. Not a 50/50 mix, but strategically placed right above the reservoir, then another layer a half-inch or so from top. On the really tall pots, a few sprinkled in about halfway up. I'll give it a week or so and see how it goes.
Bill Nye, heck yeah! Let's get some science goin' on this project! Report in when ready...