And interestingly enough, both of the peacocks shown in the photos above were/are fed the same pellet food as the bulk of their diet. In the first fish, it was fed these pellets exclusively.
I can also name several fish foods I have that contain no color enhancers: earthworm flakes, freeze dried brine, algea chips, Omega one seafood pellets. I wouldnt advise any of these as a staple, but you get my point, Not all foods contain these enhancers.
If you want to call the Astaxanthin in fish foods natural, then go ahead. It's still chemically produced. But that iss the only additive in omega one pellets. Im sure brine contain something thats a natural color enhancer, but no additives.
And please find these color enhancing additives in Aquarian advanced nutrition algae eater sinking algae chips, as well as nutrafin max plus earthworm flakes.
Pre-Digested Plankton (P.D.P.) is a new, high quality nutrient that increases growth and survival rates in fish. It enhances fish colours and improves digestibility.
High natural astaxanthin pigment levels to enhance fish colors
I can also name several fish foods I have that contain no color enhancers: earthworm flakes, freeze dried brine, algea chips, Omega one seafood pellets. I wouldnt advise any of these as a staple, but you get my point, Not all foods contain these enhancers.