Helps maintain clean water (Protein-to-fat ratio supports normal growth and helps maintain clean water. Excessive protein creates waste & unhealthy water). Great fish food for bottom feeders. No artificial colors. Wardley takes care of the science so you can enjoy your fish. Scientifically-developed formula ideal for catfish, plecostomus and loaches. Also excellent for larger tropical fish. Contains a stabilized form of vitamin C which supports a healthy immune system. Depend on Wardley - caring for fish since 1950. Made in USA.