1.Aquarium Cleaning Right at Your Doorstep - No more scooping up dirty water in a bucket, because that gets dirty. The Aquarium Cleaning Pump Kit is a system with a manual controller that has the features you absolutely need to help you clean your fish tank efficiently and quickly It is suitable for both freshwater and saltwater aquariums. Each part is carefully designed to bring you the best aquarium cleaning experience. 2.SAFE MATERIALS FOR FISH AND ENVIRONMENT - In life, humans need a safe and healthy environment, and so do fish. Every part of the aquarium gravel cleaner set is made of high quality, eco-friendly, durable, sturdy, BPA-free plastic. Choosing an eco-friendly aquarium gravel cleaner set is not only caring for your fish, but also for nature. 3.Nozzle - The nozzle is used to clean up food, faeces and fine gravel left by fish/clean up the waste while changing water; it will not hurt any aquarium creatures when using it. 4. Simple and easy to use - Simply place the nozzle and hose into the aquarium, press or squeeze the pump ball 5-7 times and water will flow out of the nozzle Choose Aquarium Cleaning Pump to make life easier.