I like the Omega One fish foods--not that I have fish right now, took my tanks down when we moved, and haven't put them back up yet.
The fish seemed to really like it as well, and were quite healthy, and it didn't murk up the tanks as much as some other foods. The petshop I was working at until I had my son got me started using it, and they feed it to the store fish as well.
Here's a link that tells you some about the food, I have NO connections with this site, just found it through google.
http://fishstoretn.com/omega_one_fish_foods.html