They should also ask what species of fish will be in the aquarium, and know which varieties do and do not go together well. Proper maintenance is imperative for maintaining the health of your fish. Simply put: Healthy fish can live for many years in a properly maintained aquarium giving their owner a real sense of connection with their aquatic pets. It is worthwhile, at least at the beginning of your ownership journey, to allow the professionals to clean and maintain your tank. Keep these few important guidelines in mind and you will have many, many years of pure fish enjoyment!