News Diagram of Fish Only with Live Rock Aquarium Another diagram of Fish Only with Live rock aquarium, great visual aid for those people new to the saltwater hobby. Shawn Mackey is the illustrator. Perhaps he will do more for the saltwater hobby? Read Ryan Gripp Ryan Gripp founded Reef Builders in 2006. He writes about technology, industry and other associated news relating to saltwater fish tanks. He went to Depaul University and has been keeping reef tanks for over 15 years.