The 7-Day Pyramid Fish Feeder contains a formulation of energy-rich food pellets. Midway through the 7-day feeding cycle, a central chamber within the pyramid is exposed, supplying a nutritious treat to add variety to the fish's diet. * Slowly releases fish pellets, allowing fish to feed at will. * Inner chamber supplies a nutritious midweek treat. * One pyramid feeds fish in an appropriately stocked 10 U.S gallon aquarium for 5-10 days.