With many convenient features to offer, Fluval Gravel Cleaner Medium (38cm) is a practical tool for cleaning and maintaining your aquarium. Narrow design ideal for Nano and Small Aquariums. Its quick-start feature provides a hassle-free startup. An exclusive gravel guard keeps the gravel in the tank, not in the bucket. An oval-shaped cleaning tube allows easy access to corners. Plus, it has a comfortable grip and non-kink hosing. The gravel cleaner works well in planted and decorated aquariums. Effectively traps dirt and debris Easy Start siphon for quick priming starts with just a couple of pumps Gravel guard prevents clogging With bucket clip Suitable for all substrates (sand, gravel, rock) For use in freshwater and saltwater aquariums Large. Cleaning tube size: 6.4 cm (2.5 in) dia. x 60 cm (24 in) L with 1.83 m (6 ft) hosing.