Breeding tropical fish is not an easy process if you are not able to provide them best breeding environment. Egg-laying females will release the eggs and the male fish will fertilize them. It is important to design your fish aquarium that will help your fish in the breeding process. Few egg-laying species will scatter the eggs, while few will carry eggs in the mouth, and few will try to build nests in order to hold the eggs. It is your responsibility to take care of the eggs because the scattered eggs are tasty and fish will love to eat them. In addition, you will need to keep floating plants that will help your fish to build nests. Briefly, you will need to design your aquarium according to the breeding habits of your egg layer fish.