A complete food for all tropical and coldwater fish. Fish can survive for relatively long periods of time on very little food, as they have to do in the wild from time to time. King British Weekend Feeders are the ideal way to provide as much nutrition as they require, while you are away from home. The special formulation includes all the necessary proteins, minerals and trace elements to keep fish healthy, active and colourful. Each block lasts for up to 3 days and does not cloud the water.