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 Holiday Food Blocks are the ideal way to provide as much nutrition as required 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. This block lasts for up to 14 days and does not cloud the water.