This wooden bubble stone diffuser is an indispensable accessory for any saltwater aquarium equipped with a protein skimmer. It produces a steady stream of that enhance the skimming process, helping to maintain clear and healthy water. The robust wooden design ensures it can withstand the demands of continuous use in an aquatic environment. Features -Color:Khaki -Material:Wood -Size:6.50X2.30X2.20cm/2.55X0.90X0.86in -Caliber: 4mm -Clear water filtration: maintain pristine water conditions with highefficiency filtration, ensuring a healthy environment for your aquatic pets -Consistent oxygen bubbles: the air stone diffuser provides consistent and even oxygen bubble release, improving water circulation -Supports aquatic growth: ensures an adequate supply of oxygen, crucial for the health and growth of fish and other aquatic organisms -Robust and easy to use: crafted from materials, these accessories are easy to replace and maintain, providing performance -Versatile tank compatibility: suitable for various aquarium types, including both freshwater and saltwater setups, providing flexibility and ease of use Package list: 2 Air Stones