All the scarlet leg hermits lived, but I'm not so sure I would reccomend them for eating hair algae. they don't seem to migrate towards it. in fact, I put some of them in it and they didn't stay for long...and I can't tell that they ate any. many of my white legs have already changed shells. If anybody gets them, i would reccomend having some other shells in the tank for them. They all came in Astrea shells, which I thought was a bit odd. Anyway, they seem to have a really hard time turning over if they get turned upside down.