The NICREW Automatic Gravel Cleaner is a powerful and easy-to-use vacuum cleaner that is perfect for removing debris from your aquarium. With its electric motor and two-stage filtration system, it is able to easily remove particles from the topmost layer of the substrate without disturbing the bottom layer. The NICREW Automatic Gravel Cleaner is also eco-friendly and supports an aquatic lifestyle with a “green” approach. It is perfect for use in both freshwater and saltwater aquariums with a water depth of up to approx. 28 inches.