Congratulations on your 1st of many hydro attempts.

I hope all goes well for you clayboy.

At first I thought you were over watering. My plants looked similar when I did an NFT system some time ago. I think the yellowing was closely related to the roots being starved of oxygen in my case. I was over watering and drowning the roots.

I'm not sure what the problems are with your plant. Glad people are on board giving you a helping hand. I'm going to read this thread again and probably ask a few questions.