pros:  look cool, with their deep royal blue color. 
         eats algae, keeps your rocks and tanks clean 
  
cons:  loose stuff gets stuck to them, 
         don't eat hair algae. 
  
I've got 4 in my main display and 1 in my nano.  
I think they live a long time, cause the 2 large ones have been in my tank for over 3 years, and they were probably a few years old when I aquired them. 
		
	
		
		
		
		
			
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				Last tank was 210 reef with 90 gal sump 
 
120 , lps. 2xKessil A350W Tuna Blues, 2xvortech mp40 for flow,aqualogic 1/4 hp chiller, 160 lbs live rock. sohal, , pair of percs,flame dotty back , royal gramma, pair of black percs, niger trigger, mandarin  
  
55 corner bowfront freshwater, African cichlids kessil a350 
  
30 gal 36x36 coffee table fish tank. 3 red ear sliders. 
  
5.5 gal nano, live rock, arrow crab, baby perc, firefish.
			 
		
		
		
		
	
		
		
	
	
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