Quote:
	
	
		
			
				
					Originally Posted by  TimT
					 
				 
				 which counters the nagging doubt you just destroyed your tank. ;^P
  
			
		 | 
	
	
 Actually, I felt like I was saving my tank! I usually wake to a good film of algae on the front glass, but today, cleaner than ever. 
Depending how the new sand develops, I may replace it annually.