A dwarf Seahare...... but ya gotta remove your macro. I had a good relationship with my
LFS. For my small tank I wanted a small emerald. So I bought one when it was really small and then when it got to big for my tank I would trade him in for a smaller one again. They were more than happy to allow be to grow them bigger for them and if they died in my care... oh well, I paid for him and I would then have to buy another small one.... good deal for them. You could also get a small turbo snail. If the hair is too long it could be too tough for any of these critters and they won't want to eat it. If that's the case, prune it down via manual extraction and then they should take over the job. A lettuce
nudi will also work but I hate to recommend them... they don't do so well normally.
