Alien High Efficiency Air Stone

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Alien High Efficiency Air Stone Quality black corundum higher density stone Creates finer bubbles for increased aeration efficiency with no increase in pressure Sucker clips for ai rline available separately The ALIEN®️ black series air stone is made of quality Black Corundum Stone which is sintered at 1500 Degrees Celsius and is of a higher density and quality than green, blue or even white corundum. It is a relatively small stone at 50mm but punches above its weight by using the air more efficiently creating finer bubbles for increased aeration with no increase in pressure. Show more