Book excerpt: Essential Tropical Fish: Species Guide is the essential guide to identifying and selecting tropical fish for your aquarium, providing a resource for both beginner and enthusiast. Compiled from years of experience selling fish in the local pet store and the fish trade, this book contains profiles for the most commonly available tropical fish, answering questions such as how big the fish gets, ideal water conditions, compatible tank mates, recommended tank sizes, tank setup needs, and dietary requirements for each species. If you’ve ever been in a tropical fish store and unsure what fish to get, what species or what to ask the shop assistant, this book will give you the knowledge you need. It is our hope that fish keeping will bring you as much fun and enjoyment as it has brought us over the years.