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			 Holy cow 2 X 400W for a 77g tank is a lot!  Unless you are upgrading to a bigger tank then ignore this.  I'm sure you have thought of it but you will definately need to take heat into consideration.  I have 3 X 400W over my 230g and need a fan blowing over the sump/fuge to control heat.  A chiller is definately on my shopping list before next summer.  My tank is 31" deep (can you say PITA for cleaning) and I still have to be careful how I place coral as it will easily bleach 
		
	
		
		
		
		
		
	
		
		
	
	
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