To be honest, I dont have a lot of experience, I just started a hydro grow. It seems that I need to run it 24/7 otherwise the plants start to droop.
Since I'm only on week 2-3, In Veg stage, I have my lights on 24/7 so I don't really see turning off the water, which keeps the plants cool and hydrated.
I'm sure lots of people will have lots to say. But so far, I've been running the pumps 24/7. I tried to run them 3 times a day, for 1 hour, and I didn't find it was enough.
What are you using for a Media? I have small rockwool cubes, inside WaterFarm buckets full of medium sized Hydroton.
The roots are already coming out of the bottom and I have a small bubble stone in the buckets moving things around. So no matter if new water is bring dripped, the roots are IN the water already...
That's what I've got so far, mind you I have super fast growth, I have nute burn it seems on the lower leaves.