Their main food is TetraDiskus - small granules of mixed veggie protein (I think) Twice a week they get a piece of either cucumber or courgette (they love both) and maybe once every two weeks frozen bloodworm or tubifex. I feed them once a day, every evening and they all go crazy for a couple of minutes, especially the featherfins and marbles and after 2 or 3 minutes I can't see any food lying around - if there is, then the bristlenose and featherfins polish it off when the rest are sleeping.