Iron Chelate helps to correct Chlorosis (yellowing) in leaves caused by iron deficency in the aquaponics system.
In an aquaponics system fish waste gets broken down by bacteria to create nitrates for plant growth. However, in many aquaponic systems there is often deficencies in other nutrients, in particular potassium, calcium and Iron,
Iron chelate addresses the iron deficency. So if the leaves of the plants in your aquaponic system starts going yeloow, its time to use Iron Chelate