The Fluval gravel cleaner effectively captures dirt and impurities. It features a simple and quick startup thanks to the self-priming function. The thumb regulator allows for adjustment of the flow rate and thus the speed of cleaning. The gravel guard prevents clogging. The suction tube can be extended for larger tanks and hard-to-reach areas. It is suitable for all types of substrates (sand, gravel, stones) and can be used in both freshwater and saltwater.