It's taken most of my new fish about 2-4 days before they start eating good. At least yours are showing an attempt at eating and not ignoring the food. I'd also recommend trying some frozen pe mysis. Not sure what flakes or pellets you are using. Mine love the Spectrum mini pellets, formula one flakes, Cobalt Spirulina flakes, and pe mysis. I'd order some frozen pe mysis. It's a good treat for all the fish (and coral) and seems to really get their appetites stimulated when not eating.