Thanks so much for helping me to understand! Since your reply I have done lots more research including your lesson plans (awesome!!!). I still have lots to learn but I'm very excited to get started. I think I will try the Floramato dry and see how the lettuce does as that is the only non-fruiting veggie I intend to grow at first. If I have issues, I will just run two or three different (independant) systems. I am hoping to purchase the parts for my first system this next week and start it outside until my greenhouse is finished (small set back as the HVAC system in the house went kaput
) Thanks everybody for posting such great information and pictures!