There are some things you must think about when selecting the right freshwater aquarium fish:
You should consider the type of tank which will be used. Some of the more well known aquarium types are a tropical community tank, a goldfish tank, a chichlid tank or a species tank. Some fish fare better in one type of tank compared to others, so you should choose your tank according to which fish you want to keep.
Another important aspect to consider when choosing fish and tanks is which fish go well together – naturally, some fish get on better with other species than others. Many breeds of aquarium fish are naturally aggressive and others are naturally passive. You must be careful that you choose the right fish to go together so they do not fight or attack each other.