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Prevent malnutrition in aquarium fish

Drs. Foster & Smith Educational Staff
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  ood nutrition is a must for healthy aquarium inhabitants and a healthy ecosystem. Every year, thousands of fish become diseased or die because of malnutrition. Poor nutrition affects the fish's immune system, making them more susceptible to disease. Nutrition problems usually result from feeding the wrong type of food and feeding improper amounts, be it too much or too little. Some of the more commonly observed problems associated with poorly fed fish include lateral line and fin erosion, hole-in-the-head, weight loss, diminished color, stunted growth, listlessness, and disease outbreaks.

determine the proper nutrition
Dietary needs differ amongst carnivores, herbivores, and omnivores, varying further amongst surface, mid-water, bottom, or filter feeders. No single food can provide all of the nutrients your fish need - protein, lipids, carbohydrates, vitamins, and minerals - in the forms each species prefer. The body type of the fish, its natural environment, and where it prefers to feed, all play a role in the type of food that best suits your fish.

Therefore, it is important to research the dietary needs of the specific variety of fish you own. You should, as best as you can, simulate the natural diet of that species and offer the foods they need to thrive.

varied diet for proper nutrition
Feeding a quality food is one of the best steps you can take toward proper nutrition. Flake foods are convenient, but freeze-dried and frozen foods offer better variety and nutrition. Gel-based foods may help your picky eaters eat what they need. Offer a varied diet, with a mixture of flakes, freeze-dried, frozen, or gel foods, and fortify their diet with vitamin and mineral supplements as needed, so your fish receive all the nutrients necessary for good health.

symptoms of nutritional deficiencies

Darkening of body or fins

Reddening of body and fins

Color loss

Fin erosion

Lateral line erosion

Lower jaw erosion

Skin lesions

Increased sensitivity to bacterial infection

Slow wound repair

Hemorrhaging of the gills

Sunken abdomen

Cloudy eyes

Exophthalmus (abnormal protrusion of the eyeball)

Weight loss

Atrophying musculature

Rapid breathing

Loss of appetite

Poor growth


Loss of equilibrium

Erratic swimming

Spiral swimming

Vitamin fortified and rich in HUFA's, Selcon boosts the nutritional quality of any food.

Nutritious Hikari Algae Wafers are specially formulated for the hard-to-feed herbivores in your aquarium.

Protein-rich Brine Shrimp Plus Flakes are a nutritious blend of seafood, plankton, algae, and vitamins.

You will see:

  • Healthier, active fish
  • Less waste
  • Reduced need for medications
  • Enhanced colors
  • Less pollution & nuisance algae
  • Better resistance to varying water conditions
    Which Food, Which Fish?

    FAQs: Fish Diet

    Food for Thought: Different Foods for Complete Nutrtion
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