What other fish do you have in there? Geos grow pretty well, my geo red heads at 1.5" have almost doubled in like 2 months or less. My dicro has grown from 3" to 6" in 5 months. So in a 55 will not be enough room for 3 or more. They will be way overstocked by summer with the geos alone and since you probably do have other fish in there, there will not be enough room. They NEED to be in a group. And they really should have sand. Do not buy anymore. Sell. Geos are different than other cichlids. Not to be rude but return it and deal with him yelling at you, you didn't research so it's your fault. Trust me just getting yelled isn't that bad And giving info to get more is bad info.