Air pump accessories: 2 bubbler stone mouths. Perfect for your fish tank or fish tank, and it's the best partner for the air pump. Stone Air Bubble Release: This bubbler stone vent will create a much more abundant waterfall of tiny bubbles you can never imagine. perfectly increase oxygen content, reduce CO2 and increase PH. Very quiet: The high-quality bubbler stone vent has a strong, porous structure and impresses with its high air permeability. air. Very quiet operation. Exceptional quality and reliability: Durable, washable and sintered at high temperature. The bubbler stone vent can be used for a long time and easily washed for reuse. Note: Long-term use, when the dirt is blocked and the air bubbles are reduced, it can be removed and washed repeatedly. Sold as a single bubbler stone vent, without a hose. stone and other accessories, please soak this product in water for 15 minutes before use. Product Description The air stone perfectly increases oxygen levels, reduces CO2 and raises PH. Creates water currents and iridescent underwater scenes. Creates tiny bubbles that fish love Suitable for pond, aquarium and aquarium. Great for aquarium air pump. Durable, washable and high temperature sintered, different from other air stones. Specification: Color: : Grey, Black Material:: Stone ABS plastic Diameter:: 130mm Scope of delivery: : 2 x bubble stone