John H. Tullock holds a master’s degree in zoology.  From 1987 to 1995, he operated a retail and mail-order aquarium business featuring saltwater fish, invertebrates and everything necessary to maintain them in the home.  He is the founder of the American Marinelife Dealer Association and served on the steering committee that created the Marine Aquarium Council. He is the author of eight previous aquarium books, including Natural Reef Aquariums (TFH) and Your First Marine Aquarium (Barron’s).