Pisces Gravel Vacuum Ceaner 12InchFor use in any size aquarium this gravel cleaner allows you to quickly and easily clean dirt and debris that has settled in the gravel in your aquarium. Using a siphon action it picks up all debris and siphons it out of the aquarium while allowing the gravel to resettle in the aquarium. Far more effective than simply stirring the gravel during a water change this method allows you to get a far better clean while changing a minimal amount of water. Also a great way of doing a quick water change without the concern of a fish going up the pipe. Simply siphon water through the gravel (probably the area most needing cleaning anyway). Great design allows you to clean a greater surface area at one time making the job quicker and easier plus handy tap and clamp make this the ultimate user-friendly gravel siphon on the market. In freshwater aquariums, water siphoned in this way makes great fertilizer for garden and indoor plants because of the high concentration of fish waste.