Fluval Gravel Vac Discount 40 The dome shape flatten sound DMFLKSS20 The dome shape flatten sound wave frequencies along with sound dampening chambers featured on each model for reduce sound Textured pet treat mat designed to help combat boredom and calm your dog to improve behaviour Can be used as a slow feeding treat or food mat to help prolong meal and treat times Great to use as a medical free way to help calm and soothe pets Effectively traps dirt and debris Easy Start siphon for quick priming – starts with just a couple of pumps Thumb operated flow regulator allows you adjust speed as you clean Gravel guard prevents clogging Tube extension included for larger tanks and hard to reach areas Suitable for all substrates (sand rock) For use in freshwater and saltwater aquariums