If you own your home and plan on having that tank for a while then I would suggest looking into and HRV. 
 
The glass top will cut down evaporation but will also need to be cleaned very often.  It'll become a chore that you will dread.  The glass top will also trap other harmful gasses that the tank exhausts.  I would never recommend a glass top. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
	 |