Berlin HO Skimmer???
			 
			 
			
		
		
		
		Modify the venturi with a Kent venturi from J&L, then replace the pump with a MAG (you'll have to do some fancy rigging to change the pump).  Also get rid of the white thumb screw for adjusting the air intake and swap it with a plastic needle valve placed in the end of the neoprene tubing. 
		
	
		
		
		
		
		
	
		
		
	
	
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