unless you want to make the special provisions for algae eaters, I would not recommend getting one just to get rid of algae. I have otocincluses, and they are hard to feed. They do a killer job on soft algae, but after that's gone, they need to be supplemented with veggies and other herbivore foods otherwise they starve.
Many other "algae eating" fish grow huge and become aggressive and more meat-eating as they grow (Chinese Algae Eaters and plecostemuses come to mind).
There is actually a bunch of people on this forum whose pet peeves is newbies trying to get algae eaters to solve algae problems, and it's gotten very heated and ugly at times. So my advice is to use a little elbow grease and clean it off yourself. Regular water changes also remove fish wastes that act as nutrients to algae.
Unless you like the algae eaters for themselves, and are willing to care for their special needs for the rest of their lives, I would advise against getting one.