Come to think of it, the only thing that was common to them besides the space was the nutrition with calmag. This happened within about 24 hours after the roots hit the solution. The common ingredients in both were calmag (8th recommended dose), which I was using so that I make up for the lack of it in the RO water, and the bat shit in bigbloom and the rain forest soil. Could the calmag or bat crap have been contributing factors? What is the ideal start solution for hydro? Is big bloom ok? The total PPM was only ~170 in hydro and about 50 on top of the soil. (last one because of the calmag)

Besides cleaning everything, what else could I do to prevent that disease? I'm going to go hydro bubble bucket/aeroponics/fogoponics in a brand new grow tent next.