Uxcell Black Mineral Bubble Air Stone Diffuser For Aquarium Fish Tank Pond Pump

Features:Sintered by high temperature.Durable and washable.Different from other air stones. Direction:1. Connect the air stone with air tube.2. Soak in the water for 15 minutes before use.3. It is durable and be used for a long time.When it is clogged with dirt or creating bubbles with low quantity please wash it for re-used.