A great stimulant and nutrition source for all tropical fish. Hikari Frozen Tubifex Cube rank at the top of the nutritional charts in high levels of essential fatty acids, protein, and pigments. Hikari Frozen Tubifex Cube has been widely recognized as the food of choice for tropical fish. The brine shrimp are collected daily, thoroughly cleaned and frozen to retain all their natural food values. Hikari Frozen Tubifex Cube? provide the essential nutrients to maintain high energy levels and vigor in your fish.,