Can simply be

However, any reservoir looks more spectacular if the water in it is in motion. This moment is also good because it prevents the “flowering” of water, and the possibility of “eternal movement” can simply be decided by creating a cascade. For example, you can build two reservoirs between which a stream is laid, water will flow from one reservoir to another, making a return path along the pipe. To do this, you need to install a sinking pump -type pumping pump, which is masked at the bottom.