Multivitamin injection is an injectable preparation containing several vitamins used to prevent or treat vitamin deficiencies in animals. In fish farming, injectable multivitamins are rarely used because treating individual fish by injection is stressful and impractical except for high-value broodstock or ornamental fish.
Potential benefits of multivitamin injections (when prescribed by a veterinarian) include:
Correcting vitamin deficiencies.
Supporting recovery after illness or stress.
Improving appetite and general condition in deficient animals.
Supporting immune function.