The instructable here is meant to share the idea and hopefully it help you to make the right decision. More information can also be found at http://allabout-aquariumfish.blogspot.com/
Step 1: Research and Info finding
Step 2: Grouping into same requirements
Fish that belongs to tropical region generally will thrive in aquarium water ranging from 24 to 30 degrees Celsius while coldwater fish demand water temperature between 18 to 22 degrees Celsius. Therefore, in order to establish your community aquarium, you will need to select the fish that has the same requirements.