Setting up Your Underwater Playground
Everything listed below is for both setups, however, if you are opting for a saltwater aquarium you are going to also need additional aquarium testing kits, a protein skimmer, and some live rock, which is an important biological filter.
The species of fish you choose will all have different needs in terms of water temperature, type, and quality, so the equipment outlined below is for general guidance. Whichever choice you make, freshwater or saltwater, will need to conduct research to ensure you make the healthcare of your fish the top priority.
Pick up some reference books which run you through everything you need to know. You can also get a fish atlas to check which species can be kept safely together, and learn more about their care.