It is important that food be distributed widely in the water flow of the tropical fish aquarium and not just put in as a large clump. This is especially true with cichlids. If food is put in as a clump one dominant fish can monopolize the clump and not allow others a lot of access to the food. This is the reason one juvenile fish in an aquarium can grow much faster than the other juvenile fish.
Source: Aquariumscience.org – David Bogert