Friggin Hair Algae

[revgeoff]

That lovely long green hair algae is starting to pop up in my 30gal seahorse tank. Does anyone know of a way to get rid of it?
-I could put my sea hare into the tank but it is doing so well in my reef tank that I don't want to transfer it.
-I don't want to add any crabs at all...I am too worried that they will bother the seahorses.
-I really don't want to take out the rock and a)transfer it to my reef tank for the sea hare to gobble up the algae or b)scrub the rock free of the damn stuff. Everyone is doing so well in there that I don't want to disrupt the tank too much (even the very small pipefish are doing well...)
Why won't snails eat this stuff!!!
Thanks for any suggestions.