Helps maintain clean water. No artificial colors. Wardley takes care of the science so you can enjoy your fish! Scientifically-developed, high-quality marine protein diet. Protein-to-fat ratio supports normal growth and helps maintain clean water. Excessive protein creates waste & unhealthy water. Contains no artificial colors or dyes that can harm fish or cloud water. Depend on Wardley - caring for fish since 1950. Made in the USA.