BioViv Garlic is particularly recommended for fish that are finicky eaters. It is a strong attractant. BioViv Garlic is also particularly recommended for aquariums suffering from ectoparasite infections. In this case,add it to the water as well as to the food. No medicinal claims are made in this regard,but fish that won't eat, particularly those with parasites,don't live long and garlic has long been used for this purpose, as well as an attractant,so fish may benefit from its natural properties. BioViv Garlic does not require refrigeration, but refrigeration after opening is recommended and will prolong its shelf life significantly.