Cichlid Bio-Gold+ contains special carotenoids developed through Bio-Technoology which allow the fish to obtain the same colors they would in higher level UV environments. Additionally, it contains a live (viable) living micro-organism which helps multiples once in the fish's digestive system and takes up nutrition that bad bacteria needs to survive. By robbing the food source it can reduce the number of bad bacteria which could impact your fish. Additionally, as these "Hikari" germ multiples it improves digestive action, which allows the fish to use more of the nutrient package, and throws off additional vitamins and minerals the fish can also utilize. These additional vitamins and minerals that are part of the multiplication action helps support immune system health. The bacteria also stays active in the waste of the fish and works to decompose it in to a powder-like consistency making it easier for your bio-action to eliminate. For monster fish, this can translate to better water quality due to the more efficient work of the bio-action on a larger surface are of the waste. The Hikari germ is a transitory bacteria, so reduced feedings or mixing with other foods reduces the benefit and after about 2 weeks of no feeding the benefit is completely eliminated. The addition of the Hikari germ and the use of the special color enhancing ingredients is why the price is higher than the Cichlid Gold.