The Penn Plax Aquarium Gravel Vac is perfect for your aquarium maintenance needs. It's designed for the removal of grungy waste, dirt layers, and debris from the gravel bed at the bottom of your aquarium. With a self-starting siphon, this product is easy to use and produces great results. It includes an algae scraper feature, so you'll be able to clean above and below the gravel line in your tank, and you won't scratch your glass. This Gravel Vac is 16 inches and has a 72 inch hose.