Airstones are a great way to add aeration to your fish tank. Connect it to an airpump (making sure you always use a non return valve) and secure it in side the aquarium. Airstones produce a fine stream of bubbles making them aesthetically pleasing whilst helping to add oxygen. - 4" (10 cm) - 1 piece - Durable air stone diffuses water in every direction - Increases surface agitation - Accelerates oxygen replenishment - Helps release carbon dioxide build-up - Fits standard airline tubing
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