Windbells air Stone Disc Aquarium Fish Tank Bubbler with Control Valve Oxygen Diffuser for Hydroponics (Air Pump and pipe not included)

- Steady and Non-toxic : Disc-shaped for optimal air diffusion and steady. The non-toxic material also keeps fish safe and healthy. - Perfect for Aquarium : Provides adequately tiny bubbles of air necessary rather than large one for plant growth, makes your aquarium look like a fairyland, allows fish to breathe properly and help to improve the organic enviroment of aquarium tank. - Adds oxygen circulation ：Adds oxygen circulation to your aquarium and when added to a hydroponic growing system, it energizes the growing solution while aerating and circulating nutrients. - Stay Stablely：Weighs 5.2OZ / 150g , heavy enough to stay firmly on the bottom of the tank without disturbing any of your aquatic animals.