I personally believe in mixing up the food and giving them a variety. It's the least I can do since I am keeping them in a tiny cage LOL...
You feed exactly what I do too. I also feed cyclopeeze, mysis, reef plankton and some others that escape my brain at the moment.
That being said, they might still be just as happy being fed nothing but formula one pellets...That stuff is real good IMO and all my fish I've ever fed that to seem to enjoy the heck out of it

You might consider Formula 2 also which is for vegetarians if I'm not mistaken.