no kiddin'  on my 25g i've got the whole back of the tank taken up by the ac500 and my skimmer but they both fit with about 2 inches left over!  lucky me.  don't forget you can put other accesories in your fuge (thermometer, heater etc.) 
 
darryl 
 
ps supposed to be hotter tomorrow!! 
		
	
		
		
		
		
		
	
		
		
	
	
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