Allright!
Yes of course I also feed it frozen brine shrimp and pellets from Nutrafin.
It's my first saltwater fish. I got it about two weeks ago and it begins to show some desease signs...
It has some (very few) white spots on the tail, fins and body which looks like ich and a rather "big" (1mm) black spot on a cheek.
The fish is still very active and eats a lot so I hope that by variying the diet for proper nutrition, it will heal by itself.
Anyways, thanks for the input.