Your Cuban has no color he is just black and white lol! I never said your fish don't have color, where did you hear that?? It was your comment that you can train any fish to eat corn flake- that is not a fact but a assumption, I have had very picky fish that unless you starve them for a week they know exactly what they like, so don't act like you know every thing, cause every one on here can learn something new all the time, that's what makes this hobby so fun!
I am not a fan of marine but agree they are amazing set ups, the fish are much more sensitive like you stated, but this is a CA/SA forum if I recall, so they have no relevance here. A mix of good quality pellets and live or frozen food will ensure your fish thrive to there fullest.
Ummm that's because Cubans are black and white, there is also a tinge of color in the dorsal fin. I don't act like I know everything, but I at least contributed something of use to this thread and answered the OP's overall question. I've fed my fish only NLS pellets, Omega One wafers and freeze dried treats. My fish are healthy and look amazing. I'm not changing what is working for them.