OF® Opti-MN. Contains Opti-MN, a thoroughly tested Metabolic Enhancer that enhances the feed’s digestibility and absorbability by at least 30%. Accelerates Growth. Contains a unique blend of ingredients that provides a complete nutritional source of amino acids, protein, calcium, fats, trace elements and stable vitamins ensuring rapid growth and development. Boosts Color. High content of Spirulina and natural colour enhancing ingredients that brings-out and improves the beautiful coloration of your fish in 1-2 weeks. The ingredients will also help improve the shine on the scales. Increases Vitality. Bio-formulated with immune-enhancing substances that fortify your fish’s immune system for better health and extra resistance against sickness and viral disease.