Helps maintain clear water. No artificial colors. Great fish food for bottom feeders. 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. Protein-to-fat ratio supports normal growth and helps maintain clean water. Excessive protein creates waste & unhealthy water. Contains a stabilized form of vitamin C which supports a healthy immune system. Depend on Wardley - caring for fish since 1950. Made in the USA.