TetraMin Tropical Flakes TetraMin has been the world's leading fish food for over 40 years. The Rich Mix of TetraMin is a totally nutritious diet for all common tropical fish. It's created by a special process that makes each flake firm and fully digestible which greatly reduces uneaten food and tank waste and increases filtering capacity. TetraMin contains essential nutrients and added vitamin C which provide optimum care and help promote energetic fish and long life. And, as always, TetraMin does not cloud the water.