Skimmer for my 125g?
			 
			 
			
		
		
		
		Skilter wouldn't work for a large tank like the one you have, even with airstone modifications. 
 
But I am using it on my 15g nano reef with counter current airstone modifications also filled the chambers with Caulerpa and attach a 13watt pc fixture to it, it's been working great for me. 
		
	
		
		
		
		
		
	
		
		
	
	
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