Jebao DCP-20000 Sine Wave Water Return Pump - 20000L/H High Flow Aquarium Pump for Saltwater & Freshwater Tanks - Ideal for Reef, Fish Tank, Pond, and Hydroponics Systems

I have used these pumps for a number of purposes and projects. They seem fairly well built, are very efficient, and move lots of water! This particular pump was installed at the bottom of a quarter-acre pond as an aerator with an air tube going down to its inlet. Will see how it lasts and update this review accordingly.One thing to be aware of: Many of these pumps are exactly the same hardware, only with differently programmed controllers for the different capacities. I haven't bought each size so I can't advise at exactly which capacities the hardware actually changes, but you are being price-gouged for the larger pumps. The pumps themselves will gladly run on a regular, sensorless 3-phase brushless motor controller up to around 48v—where they run much faster than any of the included controllers will run them. I wouldn't go past 48v as they start pulling an unhealthy amount of power.