Zeigler Marine Flake is a complete and nutritionally balanced diet for tropical marine fish. The diet contains Spirulina and other natural marine sources to enhance the vibrant colors of your fish. Highly digestible marine proteins are incorporated to increase palatability and digestibility, and thus minimize excreted waste. Increased levels of Stable Vitamin C and Brewers Yeast are included in the diet to promote healthy gill, fin, and tissue development.