Zoo Med’s Original Banquet® time release feeding blocks last 3 to 14 days, depending on block size. In addition to weekend and vacation feeding, Original Banquet® is a great daily food source for problem feeders such as Plecostomus, Algae Eaters, Redtail Sharks, Gouramis, Saltwater Tangs, Angels & Damsels. Original Banquet® blocks are also very useful for small fry which do best when constantly feeding. Now with high protein micro pellets! Great for bottom feeders. Do not use this product in fish bowls or aquariums which do not have aeration or filtration. Original Banquet® blocks will not cloud water. Available in the following sizes: Mini (Pack of 6): Duration is 3-4 days. 0.3 oz (8.5 g) Original: Duration is 7-8 days. 0.45 oz (12.8 g) Giant: Duration is 10-14 days. 1.4 oz (39.7 g)