Yup if you walk into Home Depot and ask where the Egg crate chances are they will have no clue what you're talking about!  
 
 
Light Diffuser is the proper name I believe its just under 12$ for a Huge Section. When cutting it gets very messy plastic flying everywhere. 
 
For my frag rack if you want it suspending on the wall of the tank I just glue it to the side of a cheap magfloat. Also you can rig something up with some Rare earth magnets i'm sure! 
 
Good luck. 
		
	
		
		
		
		
		
	
		
		
	
	
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