Removes grungy waste, dirt layers, and debris. Features 24 in. cylinder and 96 in. hose. Self starting siphon for regular maintenance. Perfect tool to keep your aquarium clean. Easy to use; Will not scratch glass. Easily keep your aquarium clean with the Penn Plax Gravel-Vac 24 in. Cylinder with 96 in. Hose. This simple-to-use gravel vac will remove grungy waste, dirt layers, and debris without scratching the tank's glass. The tube extends from 9 to 16 inches easily. It's the perfect tool for cleaning tanks. About Penn Plax: Penn-Plax is a family-owned company in operation since 1959. They specialize in creating excellent pet supplies for animals both great and small. Best known for producing pet products at affordable prices, the Penn-Plax brand is synonymous with innovation and quality, keeping your pet foremost in mind.