Are you sure your from the skimmer. I have seen bubbles on a leak on the return plumbing drawing in air or too fast of flow through the sump. 
		
	
		
		
		
		
			
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				360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
 360 Reef Tank 
			 
		
		
		
		
	
		
		
	
	
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