I had an ato failure a few years ago no where near as catastrophic as yours but I pumped 20 gallons of ato water into my sump which filled up fast and dumped about 15 gallons onto the floor hours of steam cleaning carpet and doing a water change and making fresh water killed a good portion of my day. 
 
I lived alone for years and I was gone like you for 12 hrs a day and nights (shift worker) so never knew what I would be coming home too every night or morning 
 
Still sucks though 
		
	
		
		
		
		
			
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				 My aquarium is nothing but a smorgasbord for my cats.....
			  
		
		
		
		
	
		
		
	
	
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