Pico Reef Tanks are small saltwater aquariums 5 gallons or less. In this video we take a tour of our 5 gallon pico reef tank that is located at the World Wide Corals Winter Park Store. The tank is full of corals, with some inverts and a few small fish. Many beginning & experienced hobbyists are venturing into the world of keeping pico reef tanks. Whether you are after your first, second or even third tank, these tanks are a fun challenge for hobbyist at all levels.