This section is to show how to set up my waterfalls. You will see a silicon tube connected to a clear tube. On the silicon tube will be a silver dial, this needs to stay there. The silver dial adjusts the water flow and noise. My waterfalls need a very small pump (Uniclife UL80) this is the exact name and size of the pump I use, bought from Amazon. The silver dial is there to restrict the water flow, so my waterfalls run smoothly.