Advice on setup

From a fellow grower:

Right now I have a problem with enough room to grow veg.and bud at same time. So I can’t get a rotation going. Other than that I am trying a new set up, a simple fill and drain system in 5 gal.buckets with a 800 watt LED light over two plants.They are not growing as well as they should be. This is my second try with no better results. I feed them nutrients by general hydroponics called flora series,i check the PH every two days it’s been OK,I keep the Room at 75 degrees&I adjust humidity as needed right now it’s at 50% in 8th week out of 12. Gets fresh air, lights on a timer.any advice?

Are you keeping an eye on your water temps? using an airstone to oxygenate your water?