A quick and easy fix to this is to install a gate valve that we can close whenever we want to turn off the flow from the skimmer. The pump is one of those necessary components. The decision that needs to be made is what kind and strength of pump to purchase. Our dream system calls for an outside pump. There are a slew of different outside pumps from which to choose.
Some models are better suited for high waterfalls than others.
Some people prefer rushing waterfalls while others prefer a gentle stream. Ponds may be built with attached streambeds that run 30-40 feet away from the pond and may rise as high as 15 to 20 feet above water level. All of these factors must be considered when determining which pump is best suited for each individual pond design. It's best to allow The Doc to help you choose the right one for you since the pump is a major cost factor and one of the most important design elements of the project. It is best to prepare a level, solid surface for the pump to sit.