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 Tom Oxygen Stones - 5 pack
Stones generate oxygen when immersed in water.
It keeps producing oxygen for about one month, enabling you to safely keep your fish in the tank without an air pump.
Also helps bacteria speed the decomposition of
waste by oxidation. Suitable for both freshwater and marine use.
Use 1 per fish. Perfect for mini aquariums.
Mfg: Tom Aquarium Products
Stone size: 1/2 inch diameter cylinder
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