I figured I would give an update on my system. After some inspection I found that the humidity in my root zone was WAY too low. It is probably a no brainer being in an air conditioned house with one of the ends wide open.
I sealed off the open end with the end cap that was supposed to be there and I just never got around to putting back on. I also opened more holes on the pipe running through the main tube. to provide water from more angles. The
pump is barely providing enough preasure so I might have to think about some new ways to deliver the water to the roots.
I am thinking about either adding a fogger or perhaps changing out the water delivery tube with one that I can place landscape misting emiters. I am also considering replacing my current lettuce system with a continuous flow WC. Similar to commercial lettuce production.
I will just have to think of a way to get it all built and prevent water leaks, and collect any water leaks that do occure.