Haven't been here for a while. Notice the din has died a tad.

Does anyone have any factual information or a first hand opinion about
"color enhancing" fish foods? Does it actually make those reds brighter?
Will it bring back a color that has faded? I am, of course, completely
skeptical. Plus, they are very much more expensive than the standard food.

Thanks in advance.

San Diego Joe
4,000 - 5,000 Gallons.
Koi, Goldfish, and RES named Colombo.