Hi Stacy,
Sorry, I have someone already ahead of you at noon today and i do not think it will fall through.
My sea hare has eaten green hair algae like shown in the picture and a small colony of brown slime/filament type algae and the algae that forms on the glass of the tank that turbo snails also eat. I Highly recommend you give a sea hare a try for whatever algae problem you may have.
The only problem with them is that if they die in your tank, they make a mess!!! so once they clean everything out, you need to sell them before they starve to death. I have never had one die before, but the stories range all the way to killing the whole tank. so you need to make sure to sell them when their job is done.
good luck