Bubble Shape Decoration: This eco-friendly resin is non-toxic, non-polluting and will not tarnish over time. Suitable for aquariums and circulation systems. Creates water currents and bubbles. underwater scenes dazzling. BUBBLE AIR - Connect this decoration to an air pump to increase oxygen and decrease CO2. Create many small bubbles (air pump not included). Improve the natural landscape of your aquarium to give vitality to your fish. Simple Care: Measures approximately 6.5 x 6 x 11cm. Will fit easily into any aquarium. This decoration will allow you to obtain the ideal waterscape of your dreams. Optimized Design: Made with great attention to detail, the resin material is stable. Does not require any special maintenance and is easy to clean. Very Decorative - Each topper is carefully packaged to ensure it is complete without defects and delivered perfectly to you. Designed for both freshwater and saltwater aquariums, can add a touch of mystery to your aquarium, in which your fish will