Use a good strainer and a centrifugal pump. When my pond is low I transfer water out of a clear water creek that runs through my property. I have a standard trash pump strainer on the intake hose that I put into a one gallon bucket. Then I wrapped the entire bucket with metal window screening that extends up and is clamped to the intake (suction) hose. There is a large worm clamp around the bucket holding the screen on there too. I made the screening area large enough that it passes sufficient water even if some leaves or debris stick onto it. I think my screening is fine enough to prevent the intake of unwanted fish. If a few tiny fry of some kind did get through, they would immediately be eaten by the hordes of BG.

The volume of water pumped will decrease dramatically with distance and increasing lift. It helps a lot if the discharge pipe is larger than the the pump outlet. Three inch pipe will transport a lot more water out of a two inch pump than two inch pipe will.

Last edited by John F; 05/03/17 10:17 AM.