Tetra Pond Cylinder Pre-Pump FilterThe TetraPond Cylinder Pre Filter dramatically reduces pump damage due to debris and is incredibly easy to install. Keep your pond impeller safe by stopping leaves, gravel, twigs or any foreign object from causing damage and premature stress on your submersible water pump. Cylinder pump pre filter for submersible pond pumps Prevents impeller damage and reduces wear and tear Increases the durability of your TetraPond Water Graden Pump Use the included