I have two cleaner shrimps in my tank with a Flame Hawk. 
They have been together since January, but the shrimps where there first, and they are fairly large. The Flame was added later at about 1-1/2" long. 
Don't know about long-term, though, but my friend has Flame Hawk in her tank for years with all sorts of shrimps and she reported no problems. 
Good luck, Lenny. 
		
	
		
		
		
		
		
	
		
		
	
	
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