The Aihotim Aquarium Gravel Cleaner Kit is a 2-in-1 multifunctional cleaner that is perfect for cleaning your fish tank. The kit includes a siphon, a sand washing station, and a water changing station. The siphon has a built-in dual powerful airbag system and an atmospheric cavity for efficient drainage. The sand washing station features an aquarium siphon with a transparent 3D filter nozzle for protecting your fish and small gravel from being sucked out of the aquarium. The water changing station is easy to use and is made of quality flexible PVC plastic that is resistant to breakdown and damage.