Groot Decoration: This environmentally friendly resin material is non-toxic, non-polluting and will not fade when the time is long. Suitable for fish tank, fish tank and circulation system. Creates water currents and dazzling underwater scenes. Make air bubbles: connect to the air pump to increase oxygen and reduce CO2. Create many small bubbles (air pump is not included). Increase the natural landscape of your aquarium to give vitality to your fish. Simple maintenance: measures approximately 11 (length) x 10 (width) x 13 (height) cm, it will easily adapt to any aquarium. This decoration will allow you to get the ideal waterscape you dream of. Optimized design: Made with great attention to detail, the resin material is stable so that it can stand stable. No special maintenance needed and easy to clean. Highly Ornamental: Each Groot bubble ornament is carefully packaged to ensure it is complete without defects and delivered perfectly to your hands. Designed for both freshwater and