A species tank, which involves catering to a certain species that only get along with each other. Predator tanks are good tanks to have also. These fish will only eat things, like goldfish, that will only fit in their mouths. They usually stay away from fish their size. These fish may not be big, but they will attack an enemy fish even if it means death to themselves.
Real plants offer great advantages to an aquarium.
They help complete the natural cycle that fish have in their home environments. Some plants need an immense amount of light to flourish while others need minimal light. Usually an Aquarium shop will note what light exposure each plant needs. Plants also grow great in a gravel and sand mix. Gravel can be purchased at your local aquarium shop and sand can be purchased in Menards or Home Depot .