Excuse me for using your picture for example. Ok Here , all the green color that high lighted. you don't need it. Just install one return pipe and a vale that you can adjust the flow of the return water. One emergency over flow pipe. In cause if you for got to clean your filter and the filer got clog or the return pipe got clog , then the water will escape in to the emergency pipe. This way the water can get back to your pond not all over your house floor. Good luck


Bro that's like adding another 5-6 feet of head...