Quote:
	
	
		| 
			
				 
					Originally Posted by chin_lee
					
				 
				i leave enough room for magnet cleaner to get through just in case i want to clean. also better flow around the rocks if need be. 
			
		 | 
	
	
 That's my biggest concern.  If there is not enough flow behind the rocks then you could have a big algae build up back there.