I fill my pond as needed with a 2 inch , 3 hp pump rated at 3600 gallons per hour. The water goes into a 5 gallon bucket that has holes drilled into the bottom and lower side. This bucket never over flows and I have enough oxygen with this manner of fill that I never have dead fish. I watch to make sure at all times that the fish are taking this water and it is not causing them any problems. My pond was filled with this well.
