The Gel-Tek 12 piece counter display comes fully stocked with 3 four ounce bottles of each of the following Gel-Tek products Ultra Color FX, Ultra Gro VX, Ultra Cure PX and Ultra Cure BX. Ultra Color FX is a source of essential nutrients to amplify the natural radiance and color in your fish as well as build up anti-bodies to prevent disease. It will keep your fish healthy while enhancing their natural colors to astounding beauty in just a few feedings. Ultra Gro VX is an amazing mineral rich dietary supplement that is formulated with a premium blend of Spirulina and other essential nutrients to provide additional nutrition for a healthier and stronger immune system. Ultra Cure PX is formulated with Metronidazole, Flubenol and Praziquantel and controls a variety of internal parasites such as intestinal worms, tapeworms, flagellates and Hexamita. This innovative gel directly treats infected fish and helps prevent secondary infections which can often occur during periods of infestations. Ultra Cure BX controls internal and external bacterial infections such as septicemia, kidney disease, wasting disease, and bacterial enteritis. It also reduces secondary infections arising from diseases such as neon tetra disease, flavobacterium columnare and fin rot that can result in ulcers and open soars. All Gel-Tek products contain a special blend of fish pheromones, which are natural chemicals secreted by fish that influence certain behaviors. These pheromones help to entice and enhance feeding behavior so that the gel is quickly consumed by the fish in the aquarium. It is safe for all freshwater and saltwater fish and will not harm aquatic plants or invertebrates.12 four ounce bottles