MOAN 6-Inch Mineral Bubble Diffuser Air Stone Bar for Aquariums (1 Piece Aquarium Tool

100% Brand New and High quality. Made of high quality and harmless mineral material. Rising bubbles enhance vital aquarium aeration & water movement. The air stone should be soaked in water for at least 15 minutes before use. Fits for 0.16"/4mm inner diameter tube. Keep providing oxygen for your fish to breathe. An air stone, whose purpose is to gradually diffuse air into the tank and provide oxygen for fish to breathe, is an necessity to have around your house if your are a lover of aquatic animals.