How often do you guys clean the actual housing on your filters?  I have 3 tanks that are up against a wall and it’s almost impossible to get my hob’s Off of the back to clean them.  I always clean the media..every 2 weeks.  Is it bad not to clean housing or casing?
				
			 
	             
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		