Ideal for both aquariums and small ponds. TetraFin Goldfish Flakes feature a new formula that promotes longer life and better health for goldfish. This special formula meets all nutritional requirements of cold-water fish and will stay firm when fish strike. TetraFin now features ProCare, a health-enhancing system that contains Omega-3 fatty acids to give fish the "healthy fat" needed for energy and growth, immune boosting ingredients, and a biotin supplement to bolster metabolism. In addition, TetraFin offers increased levels of Vitamin C.