I have a 130 aqua via pump in my 6 plants, 5 to 8 gallon rez setup and I leave it on 24/7. Most drop systems can go that. I am on my 3rd grow and when I try to cut back during the dark they kind of droop. they get used to the water. I start them in 1 inch rockwool and then 3 inch net pots and hydrotron clay rock. Just bend the drip pipe so it does'nt drip right on the stem or rockwool. Make it just to the side a little and no problems. Check out monster bitch in my thread (redhair ladies).