Features: 1. Round Disc Design helps to keep stable at the bottom of the tank, which maximizes the outlet area of the gas stone, makes more micro bubbles to your tanks and aquariums. 2. Strong and durable, the tiny bubbles they produce can reduce the carbon dioxide content in the water, keeping fish alive and healthy. 3. The greater the power of the air booster pump, the lower the water pressure, the more even the air out of the air plate. It is suitable for 4mm air pipes. (OXYGEN PUMP, AIR PIPE AND STOP VALVE ARE NOT INCLUDED) 4. Corrosion-resistant, bright and easy to clean; if the pores are clogged after being used for too long, it can be cleaned with a brush, which is very convenient. 5. Suitable for hydroponic systems, ponds, aquariums, fish tanks and other systems. Tips: 1. Before use, please soak the bubble plate in water for more than 24 hours, or use sandpaper to smooth the surface of the bubble plate. (The high-power air pump can also punch out the pores on the surface of the sintered disc). 2. When using the bubble tray for the first time, some parts of the air bubble are unevenly discharged or there is no air out. Perhaps it is because the air pump has insufficient air capacity. Please replace it with a higher-power oxygen pump and try again. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Size: As the picture shown Color/Style: As the picture shown Include: 1 x Air Stone Disc Bubble Diffuser