I have made some rookie mistakes with this round of grows and got too gung ho with my feed schedules and caused problems with lockout, but I have backed off on my feed schedule and things are starting to recover some what.
I also made the mistake of not washing the hydroton well enough and ended up with brown sludge attached to everything. So I washed a second batch thoroughly and then left it bubbling away away in a 5 gal bucket with a big air stone with the water ph'd to 5.5 with some h202 in the mix.
I then completely and carefully replaced the hydroton in the net pot, there was a root system but not a very good one. Since replacing the hydroton there has been no brown sludge.
There has been some improvements but not great ones, if there aren't great improvements I the next couple of weeks i might sadly pull the plug on this plant.