Although it is important to choose an aquarium that you think will look good in your living room, there are other equally important considerations that affect the ongoing expense as well as the health of the inhabitants. You should probably have some idea of what type of fish you want to keep before stocking the tank to avoid problems later. Do some research on each fish before adding them to your aquarium. Some fish are predatory or aggressive and so should be kept either by themselves, or with other predatory species. For instance a neat predatory aquarium can contain lionfish, eels, and groupers. But smaller fish like damselfish and cardinals could quickly become lunch! Some fish are slow feeders, or are very shy and should be kept by themselves in a species tank. Examples are shrimpfish and seahorses.
