Remove silt and small debris from the bottom of your water garden with these powerful vacuums. Whether the pond bottom is covered with gravel and stone or is a smooth surface, the electric motor provides great suction to help you remove unwanted sludge, silt and leaf debris. Select various heads to do the job correctly. You can choose from a head to remove silt from a stone surface, a string algae head, a squeegee and a crevice tool. One has continuous suction and discharge keeps the vacuum running for quicker cleaning. The other vacuum has a suction/discharge cycle. A check valve prevents dirty water from returning to your pond. Direct the discharge into your garden or into a container for easy distribution into your flower beds.