Reflectors
			 
			 
			
		
		
		
		Hello, 
 
The glass use for the aquariums are transparent with no coating.  The mirrors have a reflective coating that overtime will fade away, or whatever happens to them.  Just look at the edges of the mirror in the bathroom. 
 
As for mylar sheet melting?  I never thought of that as that's what the hydroponics people use. 
 
Titus 
		
	
		
		
		
		
		
	
		
		
	
	
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