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			 In my experience with the herbie setup I can't ever tune the gate valve finely enough to EXACTLY match the pumps output. The output also does change I suppose very slowly as it gets dirty. Either way what I have done is get it as close as possible so that the very slow creep is up and the emergency drain always has a very small amount just seeping down it. Bubble free, silent and like you said I have both my main pipe and my emergency very high. The overflow skims but drops about 1/2" into the box. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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			#2  
			
			
			
			
			
		 
		
		
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			 When I end up having to upgrade my tank to fit the growing school of tangs, I will probably be looking at a tank of the same dimensions. 72" x 30" x 30". I'd have to remove the door frame but if I have to do that, then it'll be worth it.  What a huge thread Tony. 
		
	
		
		
		
		
			Anthony 
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	If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!  | 
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			#3  
			
			
			
			
			
		 
		
		
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			 I am glad that your wave box will work for you. When are you putting rock in that bad boy? 
		
	
		
		
		
		
		
	
		
		
	
	
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			 Hey Tony, can I come by to see the new setup. Please Please, pretty please? 
		
	
		
		
		
		
			
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	![]() Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite) Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO) Type of Aquarium: mixed reef (SPS & LPS) with fish Dosing: Mg, Ca, Alk  |