How to treat vitamin deficiency in fish?

Vitamin A group: When fish lack vitamin A, it causes poor eyesight, dry eye disease, night blindness, bleeding of the skin and eyes, keratinization of epithelial tissue, bleeding at the base of the fins, deformed gill filaments, gill filaments often fused together, enlarged tips, abnormal bone development, poor appetite, and slow growth. To address these symptoms, increase the vitamin A content in fishery feed and use vitamin mixes in combination. For example, when raising herbivorous and omnivorous fish, green feed, carrots, and yellow corn can be added to and combined with the feed.

Vitamin B group: Fish lacking vitamin B1 refuse to eat, and their body muscles atrophy, with convulsions, edema, slow growth, and loss of balance; fish lacking vitamin B2 refuse to eat, grow slowly, have eye bleeding, cloudy lens, abnormal swimming, and anemia; fish lacking vitamin B6 refuse to eat, with nervous system disorders, epilepsy, anemia, abdominal edema, rapid breathing, soft and deformed operculum, bulging eyeballs, abnormal swimming, and spinning movements; fish lacking vitamin B12 have reduced appetite, lowered hemoglobin, broken red blood cells, anemia, frequent congestion of the skin, eyes, and fins, sluggish movement, motor incoordination, darkened body color, and increased mortality. The feed formula needs to be adjusted by adding mixed vitamin preparations to fishery feed or increasing the amount of B vitamins according to the symptoms. At the same time, more feed rich in B vitamins should be given, such as green feed, brewer's yeast, fish meal, rice bran, cake meal, wheat bran, @#@245@#@ powder, and meat-and-bone meal.