Variety is the spice of live, offer your fish a variety of quality algae and seafood based frozen foods, nori is also good for hebivourous fish and a little quality flake every now and them cant hurt. Sanjay has a pretty good recipe for fish food, <a href="http://www.personal.psu.edu/faculty/s/b/sbj4/aquarium/aquarium.html" target="_blank">http://www.personal.psu.edu/faculty/s/b/sbj4/aquarium/aquarium.html</a>