Fluval Gravel Vac Discount Frozen CONTROLLED GROWTH Specifically designed to Mini CONTROLLED GROWTH Specifically designed to achieve a controlled growth rate in large and giant breeds Meals for Mutts Bacon and Eggs kickstarts your pet's morning the right way filling their bellies with the nutrients to maintain consistant levels of energy throughout a whole day rock) For use in freshwater and saltwater aquariums 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