Um your soil is ick.
At this point, the best thing you can do is flush the living CRAP out of it.
I know this is an experimental grow, but if you've got those time capsule things, it's possible to create more prblems feeding chemical ferts.
If you can find that fish emulsion, it's great stuff since it also seems to buffer the pH as I believe it has ground fish skeletons as well= calcium= GREAT for sick pot plants.
Gads... good luck! It'll be sweet if you can bring those plants around! You will learn a LOT about troubleshooting your garden!