Airstone or Beckett
			 
			 
			
		
		
		
		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 
		
	
		
		
		
		
		
	
		
		
	
	
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