Fluval Gravel Vac Discount 40 The dome shape flatten sound TE015 The dome shape flatten sound wave frequencies along with sound dampening chambers featured on each model for reduce sound API® Melafix is an all natural antibacterial treatment that works to treat infections in fish 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