Feature: 1. This aquarium bubbler gradually diffuses air into the water tank, helping to eliminate large bubbles caused by the filter system and noise. 2. Oxygen that generated by this air stone will increase in the circulation to keep the fish healthy. 3. This non‑floating oxygen bubble diffuser is very suitable for all kinds of aquariums, and can easily match all styles. 4. Different from similar products on the market, this aquarium bubble stone is easy to install within a few seconds and has a non‑floating and practical design. 5. DIY connection, create the bubble length you need and adjust it as you like. But it needs a very powerful air pump to have better results. Specification: Item Type: Air Stone Bar Material: White Fused Alumina Suction Cup Diameter: Approx. 2.5cm/1in Applicable Air Pump Power: Min 5W Applicable Inner Diameter of Trachea: Approx. 4mm/0.2in. Package List: 1 x Bubble Bar4 x Sucker Note: Before use, please soak this product in water for two hours for long‑term use, and use it with an air pump of appropriate power. If the dirt is blocked and the bubbles are reduced, it can be cleaned and used repeatedly.