wow what a pathetic first post from a little bitch
Haha....don't get all bent, that's a guy who I know has a lot of respect for my ability. He's someone that I actually know who think's he's funny.
Here's an update....I decided to apply a bit of the scientific method here because I couldn't decide what to do and something needed to be done. I disconnected my pump and ran a hose to one of the plants so that plant has been getting ridiculous amounts of water while the others have gotten very little water.
Over the past 12 hours the plant that has received the extra water is doing much better. The necrosis and the limp lower leaves are still present, but I would say much improved. So I've hooked the pump back up the regular way and I'm now watering 10 times/day instead of 5. I dug out on of the rockwool cubes a little bit to see it's moisture level and it's actually bone dry.
So FDD I think you were right, underwatering and a nitrogen bump. The extra nitrogen seems to have drastically slown the necrosis (although oddly enough it burned the leaf tips just a smidge. I think they'll make it through to the ened although it's early to say now, but I'm at 4 1/2 weeks and things seem to be holding on. We'll see how things turn out, but I'm a lot more optimistic now than I was previously, at least I have a REASON to believe that watering 4x-5x /day is too little. The rockwool isn't absorbing as much moisture as I feared.