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			 Hello Tom, 
		
	
		
		
		
		
		
	
		
		
	
	
	That's right. Because the Aerofoamers inject water directly into the acrylic tube, there's no chance for bubbles to collect and build up. So no turbulence. I agree with the maintenance issue with airstone. However, speaking strictly on a performance side, you can't beat the bubble size and the fact you can have CONTROL over the water and air ratio. Titus  |