I totally agree with the above statement about coating your concrete.  A friend rinsed out his tank (with the last 2" of saltwater in it) beside his sidewalk and within a few days the sidewalk look like it had been attacked from that side.  Even though it was watered down. 
 
Otherwise, this build is awesome!  I love how you are moving so quickly...keeps me looking several times a day for an update. 
		
	
		
		
		
		
			
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				Mark...
  
290g Peninsula Display, 425g total volume.  Setup Jan 2013.
			  
		
		
		
		
	
		
		
	
	
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