I have not yet decided on pumps. I have seen others have pots with water and the roots of the plants seem to keep the water clean. Plus I think I will throw a few mosquito fish from my pond in the water pots to keep any creepy crawlies away. But the pot village location is a south facing wall with full sun and I could easily add some small solar pumps to move the water. I think I might wait to see how they go.