Easily keep your aquarium clean with the Penn Plax Gravel-Vac 16 in. Cylinder with 72 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. * Removes grungy waste, dirt layers, and debris * Features 16 in. cylinder and 72 in. hose * Comes with self starting siphon for regular maintenance * Perfect tool to keep your aquarium clean * Easy to use; Will not scratch glass