agreed. a sea hare worked great on hair algae for me.
unfortunately it worked so well it starved to death when the tank was clean of hair algae
. maybe try to arrange somone to pass the sea hare along to when you're done with it, so it doesn't starve in your tank when the algae's gone.
if you're using seio/tunze's for water flow, you can just wrap vinyl window screen around the intake sections to prevent the sea hare from getting caught. You'll have to clean it twice a week though. I had to save mine once from the overflow chamber too. that was a pain.