I have a five gallon tank with a heater, filter, and light and I'm wondering what is compatible with him. There is quite a bit of brown algae that grows along the side of the tank, and I'd really like something that will clean it, and is small. I was thinking about a snail, would it clean the sides and get along with him? I had ghost shrimp and they didn't really do anything except clean up, which was pretty cool. So is there anything that will get along with him, clean the tank up a little, and eat the leftover food? thanks.