DECORATION - This ECO-Friendly resin material non-toxic, non-pollutant also it won't fade when the time goes long.Suitable for aquarium, fish tank and circulation system.Creates water currents and dazzling underwater scenes. MAKE AIR BUBBLE - Connect to the air pump to increase oxygen lower CO2 .Create abundant small bubbles(Air pump is NOT included). Increase the natural scenery in your fish tank makes your fish vitality.air pump is not include SIMPLE MAINTENANCE - Approximately measures 2.7 (length) x 2.7 (width) x 4.7 (height), this will fit easily in any aquarium. this air bubbler ornament will achieve that ideal aquascape you have been dreaming about. OPTIMIZED DESIGN - Crafted with great attention to detailResin material is stable so it can stand steadily. No special maintenance requirements and is easy to clean. HIGHLY ORNAMENTAL - Each air bubbler ornaments is carefully packed to ensure that it is complete without flawed and perfectly delivered to your hands. Designed for both fresh and salt water aquariums ,can adds a mysterious to your fish tank,your fish will have fun all the day.