Air Stone for Ponds, Bubbler for Aquariums, Large Air Stone Disc, 4 mm/8 mm Hose Can be Connected, for Ponds, Aquariums and Aquariums

Made from high temperature sintered sand and stone, it is strong and non-toxic and can be safely placed in your pond and aquarium. Suitable for connecting 4 mm / 8 mm hoses. The air stone made by high temperature sintering is more durable than ordinary air stone. You only need to clean and brush the surface of the vent once a month for long-term use. The air outlet has a flat design and the high-density pores ensure that the air outlet expands evenly and stably. The frosted structured vent can increase the oxygen content of aquarium pond water, reduce carbon dioxide concentration, and keep your fish and shrimp alive. Our air vents are ideal for use in ponds, aquariums, windponds, seafood ponds, aquaculture, etc.