I have a Yellow tang, Yellowed Eyed Kole, Hippo 
 
Yellow has shown no growth other than getting fat (had him 3 months). 
Hippo tang I got at maybe 2" and is now easily 4" (had him just over 3 months). 
Kole Tang Has gotten fatter for sure but he hides anytime im near the tank so I dont see him much, but I dont think hes really grown much. 
 
Interesting side note. 
 
My 2 clown fish being moved from a 35gal to a 125gal have doubled in size in 4 months and show no signs of stopping. 
My 6 line has grown quite a bit as well with the extra swim space. 
		
	
		
		
		
		
			
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