Jude, i dont know if there is a difference, i feed goldfish flakes, tropical flakes, ox heart, brine shrimp, cichlid sticks, and plant chips, occasionally the fish get frozen blood worms or the garden variety earth worm, i guess if the goldfish flakes are lacking in something i make it up with the rest, i hate the same thing for tea two nights in a row, i guess the fish like a bit of variety as well