A local buddy of mine had hair algae problems to the point that he was so frustrated was thinking of tearing the reef down and maybe starting over. I went and looked the tank over. All the corals looked great, just a really bad algae problem. Talked him into a sea hare. Saw him a week later and he said the hare was not doing anything about the algae. 2-3 weeks later he said there was not a speck of algae to be found and now he is having to feed the sea hare nori and the like so it has something to eat.