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The Oscar Enterprises Oxygen Stones are a very unique product for small aquariums. All you do is toss one of these small stones into your fish bowl or small aquarium, and it will generate oxygen for up to one month! This enables you to keep fish in a small tank without the use of an air pump. Also helps bacteria speed the decomposition of fish and plant waste by means of oxidation, thus keeping your tank cleaner and clearer. Suitable for both freshwater and marine use. Use one stone for 1 fish in a bowl, 2 stones for two fish, and so on.
Size: Each stone is approx. 1/2” x 1/2”