I’ve been feeding the adults with New Life Spectrum (NLS) Small fish formula as well as frozen/live food from time to time. As for the young, they were raised on liquifry one, until they are big enough to eat crushed NLS ‘grow’. Took them some time to take to it, but now they LOVE the stuff, and it’s doing great for their colours. Mine are on grey andn ot black gravel, but still getting the kind of stunning colours like the ones you often see on these forums.