I've got a power bar that looks just like the ones pictured.  I know what I did to it though, I got SW all over it.  I'll bet that those power bars either had water or salt creep short them out.  A power bar for an aquarium should never be on the floor.  Any power cables should dip lower than the plug to avoid water running down the cable. 
		
	
		
		
		
		
		
	
		
		
	
	
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