i have a drip system i run for my veg, pump is on 45 minutes every 3 hours. for my flowering its an ebb & flood, pump is on 15 minutes every 3 hours while the lights are on. all my res also have air pumps in them. a lot of people will have different times and intervals, but as long you get your medium nice and wet and give it time to breathe between watering you should be fine.