Well about 2 days ago I pick up a lawnmower blenny from my local lfs. It's about 3 inches long and I got it because I have hair algae growing everywhere and the lfs said that it would eat it. Well I started reading on then and I've heard so many bad reviews about them like they kill other fish and they just make a bigger waste load and don't eat hair algae. Is any of this true? If it is what things will eat hair algae?