Grand 4” Cylinder Air Stone with Brass Nozzle for Biofloc Fish Farming Tank Pond Aeration Aquarium Increase Oxygen Healthy Environment for Your Fish (6 Stones).

An Air Stone, whose purpose is to gradually diffuse air into the tank and provide oxygen for fish to breathe, is a necessity to have around your Biofloc Fish Farming Tank, Pond Aeration and aquarium. It’s also a must have for Hydroponic and Circulation system. GRAND Air Stones are made of high quality non-toxic mineral material, with high temperature sintering, stones are sturdy and durable, have high dissolved oxygen rate and create even and tiny bubbles rather than a limited number of large ones. BEFORE USE: You have to soak it in water for about 6 (SIX) hours before connecting to an Air Pump. Package Contain: 6 pc X 4 Inch Cylinder Air Stone with Brass Nozzle suitable for 15,000 Ltr Biofloc Tank.