Start a feeding frenzy for your friendly fishies with the Zoo Med Original Banquet Block Time Release Fish Feeding Block. This unique feeding block for your fish is designed to be a great daily food source. It’s fin-tastic for problem feeders such as plecostomus， algae eaters， redtail sharks， gouramis， saltwater tangs， angels， damsels and more. This fish feeding block is formulated with high-protein micro pellets and will not cloud the water in your tank. Use it only with fish bowls and aquariums that have aeration or filtration.