It will take a few days for them to get used to thier surroundings. This hobby is a test of patience. They shoud be more active with time, but they won't just lounge at the surface eating slowly. My cichlids don't like to go to the top of the tank at all. They want to hide at the bottom and "hunt" the flakes at the top. After a quick dash to grab a mouthful, the go back to thier hiding spot.