3 Pack Of Deluxe Professional Cylinder Mineral Air Stone 1.5" For Fresh Water & Saltwater Aquariums, Aquaculture, Terrariums & Hydroponics! 3 Pack - The Deluxe Cylinder Mineral Air Stone - 1.5" Diameter - is a great way to oxygenate your tropical fish aquarium or small hydroponic growing system. Provides a continuous stream of bubbles to help aerate your system For a small hydroponic system the micro-pore design energizes your growing solution as it aerates and circulates your nutrients. It will extend the life of your nutrient solutions. Helps to keep your roots healthy and promotes exceptional growth. The Deluxe Cyliner 1.5" Diameter Air Stone is great to put at the bottom of your reservoir for aeration In aquariums the air stone can placed in filter tubing, filters or be buried or hidden to add to your dcor Uses a standard tubing connection, helps to maintain an even water temperature Package contains one Deluxe Cylinder Mineral Air Stone 1.5" Diameter. Consider these other items: hydroponics air pump, aquarium air pump, airline tubing, check valves, Blue Spotted Betta Log, betta net, betta fish, betta tank and Blue Spotted betta leaf