By dripping vitamin preparations such as JBL Atvitol on common fish foods such as flake food, granulate, but also frozen and live food, they can be enriched with vitamins that increase the nutritional value of the food. The addition of vitamins to fish feed has a prophylactic effect against deficiency symptoms and strengthens the immune system of the aquarium inhabitants. Atvitol from JBL therefore also prevents illness. A special emulsion process also makes fat-soluble vitamins available. An additional gain for every type of aquarium inhabitant, whether in freshwater aquariums or marine water tanks.