Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
What is in the pond that keeps entering the pump?
Roots? Try keeping the pump higher, and the plants in containers or soil (thin layer) on the pond floor. Then a layer of pebbles to cap the soil. Pump on a brick can help.
Mud? Keep the pump higher, add more filter media.
Other debris like leaves that fall in from outside? Put a mesh over the pond.
Keeping the pump in an open box can help, especially if the box is large enough to hold some filter media on all sides that are open. Google Aquablox and go to Aquascape look at those pictures. A simple box like that, with a coarse sponge inside, can prevent a lot of debris from clogging the pump.
Redigging the pond (if it has a flexible liner) can help, too.
1) Dig a low spot, a deep spot, where you can access it and keep vacuuming that spot. Keep the pump away from this area. Surround the area with large (6-8") rocks that will keep smaller pebbles from drifting in here, but the mud and muck can pass through between the rocks. A shop vac that handles water can vacuum this, or if there is a lower garden area then it can be vacuumed by siphon
2) Dig a space near the easiest access and make it like a swimming pool intake. A mesh in front of this will keep out a lot of debris without an Aquablox, and the pump is in this void. Keep the pond water level high enough that the pump never runs out of water.