Ensure proper aquarium aeration with Aircore Sand Airstones. Made with pressed sand, Aircore Sand Airstones allow even distribution of air throughout the entire airstone for dynamic bubble production. Crenellated (notched) design increases bubble producing surface area for the production of more aquarium-aerating bubbles. Airstones, curtains, and diffusers require an air pump and airline tubing for use (sold separately).
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