i feed one main meal a day, usually frozen food, but a few times a day i will oss a couple of pellets in, my wrasse and tusk usually will grab them before anyone else can get them, they need a few small meals a day probably because they are in constant motion. As far as seeing white spots, look very close, because they also like to bury themselves in the sand, and occasonally get a few grains stuck to them, it really can look like ick at a glance.