I have a healthy (zero ammonia and nitrite) goldfish tank that's developing an algae problem (placement restrictions unfortunately expose it to direct sunlight for a little while each day). Couldn't I get an algae eater of some type to help with the problem? What would be the best choice for an algae eating tankmate to the goldfish? A pleco perhaps? Are there any that don't get so darned big? Any other suggestions? I once had a sucker loach, but it was a nasty sucker, and wouldn't want another one. Thanks!