The Siphon cleaner pump makes partial water changes easy and effective with minimum effort. A couple of squeezes on the hand pump is all that is needed to get the pump working. While emptying water from the aquarium the cleaner pump will also suck up dirt and debris from the bottom. Easily remove water from your aquarium and vacuum waste away from the base. Move the nozzle around the ceramic media to take out waste and debris with the water.