I have no doubt that there may be something more healthful than whatever most of us feed however, I feed a lot of Hikari jumbo carnisticks (along w/ their 'food sticks' variant) and I haven't noticed anything negative about it from my pedestrian perspective.
I also go through 5 pound jugs of Spirulina, Algae & Veggie Sinking Wafers by Aquatic Foods c/o Amazon. It's like crack for giraffe cats and oddly, even the bigger peacock bass will hit it and not spit it out. I've got an arowana that will hammer a couple of them down as well.
When contrasted against my own diet which yesterday consisted of a poor boy from Round Table Pizza, two McDonalds apple fritters, a few packets of instant oatmeal (the full tilt sugar content variety) and a couple three diet cokes and some cold coffee... I'd say the Hikari stuff is comparatively pretty darn good.