Eterspr Air Stone for Ponds, Bubbler for Aquariums, Large Air Stone Disc, 4mm Hose Can Be Connected, for Ponds, Aquariums and Aquariums
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DURABLE MATERIAL: Made of high temperature sintering sand and stone, it is strong and non-toxic, and can be safely placed in your pond and aquarium. Suitable for connecting 4 mm hoses.
Durable design: Air stone made by high temperature sintering is more durable than ordinary air stone. For long-term use, you only need to clean and brush the surface of the vent once a month.
Air outlet: The air outlet has a flat design, and the high-density pores ensure that the air outlet expands evenly and stably.
Functional performance: The matted structured vent can increase the oxygen content of the aquarium pond water, reduce the carbon dioxide concentration and keep your fish and shrimp alive.
Wide range of applications: Our vents are ideal for use in ponds, aquariums, wind basins, seafood basins, aquaculture, etc.