exactly, i have no need to stop the pump because water just drips down and off roots, the roots or base of the plant is at the top of a rubber maid cut a hole put in a netpot with rockwool 1" cubes surrounded by hyrdoton, so i have about a foot 1/2 of roots just out and chillin under the netpots. they key to this is having a drain to a seperate resevior, so your roots have no where to grow into submerged water, they just stay wet 24/7 and can breath aswell.