Yeah, the purple stuff from Sals seems to be good stuff. My achilles wouldnt really eat green nori sheets or flake (just liked mysis) until I tried the purple. Now he eats everything except pellets, too.
I also fortify foods with garlic and omegas, so they have a good nutritional value.
Phoenix, my hippo loves pellets, too. My hippo was half the size of my achilles ~7 months ago, and now that I feed 3-6 times a day for the anthias, he has caught up to the achilles and is about 3.5" He is the tank pig, and even out competes the percs