Tom Aquatics Oxygen Stone Card of 6 Oxygen Stone generates oxygen when immersed in water. It keeps producing oxygen for about a month, enabling you to safely keep your fish in a small tank without the use of an air pump. Oxygen Stone helps clean the water. Oxygen helps bacteria speed the decomposition of fish and plant waste by means of oxidization. Oxygen Stone is suitable for both fresh and marine water. Size:5 pieces/box

Tom Oxygen Stone

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