hey guys,
so I put four little 5V submersible pumps in a reservoir to water 4 plants in pots above them. I have a relay shield on my duino that is cycling each relay/pump right now to test the pumps. (Pump A for 1 second, Pump B for 1 second...) It all works fine for the first couple of rounds but then the pumps stop moving fluid, yet still spin and sound the same. Is it some sort of water hammer thing going on er wha???