ITEM: Package includes three (3) NEW Air Stones. The pictured item is the item you will receive. DESCRIPTION: The air stone breaks up the flow of air into the aquarium into a mass of bubbles. After a time the air stone can become blocked by calcification, especially in hard water areas, reducing the flow of air into the aquarium. Replacing the air stone every few months will keep your aquarium bubbling away nicely. In some hard water areas it may be necessary to replace the airstone more frequently, but once every 6 months should be sufficient for most owners. For use with any size biOrb or biUbe aquarium. Replacing the airstone is extremely easy. The airstone is located in the center of the aquarium under the filter cartridge, simply remove the filter cartridge and you will be able to locate the airstone. A replacement airstone can simply be pushed into place. SHIPPING: Free Local/Domestic Shipping! **Feel free to ask me any questions**
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