Adding vitamins to fish food · Use agar (or gelatin, but agar is better) to make a solution and add the vitamins, then coat the food with the suspension and allow it to dry, about 50ml/kg of pellets. Good quality fish or corn oil can be used as an alternative - less is needed since a fine coating for -'stickiness' is all that is required. This can then be stored in a plastic bag in the fridge for a week. New food should be made up weekly if prolonged courses are intended. · Make a koi cake with pellets, prawns etc and include the vitamins with agar and put the mix in the freezer poured into an ice cube tray. This way a cube can be popped out as necessary. Minimal handling pays dividends, always try to use oral antibiotics instead of injectable ones whenever possible. · Always consider the effects on filtration of whatever you add to the water. | 
