GarlicGuardâ„¢ is an all natural garlic scented odor and flavor enhancer for freshwater and saltwater fish. Our research has shown that many fish are attracted to natural odors, such as garlic. Simply mix GarlicGuardâ„¢ with any food item to attract the interest of finicky eaters, e.g. discus and marine angelfish. GarlicGuard is safe for reef and planted aquariums.