Well, it's funny, I've read so many thing about the fish that I keep in my big tank that I think sometimes people don't know what they are saying. This is not here, no worries...lol
I have a 55g with 3 African Ropes, a Dragon fish (not arowana), and several Angels (as well as a betta container and a few algae eaters) anyway, regarding the ropes. mine are doing fabulous! I've read they are picky eaters...OY mine are not! they eat flake food (seen it happen), shrimp pellets and all the frozen food that I can feed them. They come up to the top at feeding time and take it right from my fingers. The dragon fish also loves to eat all of the above. and of course so do the angels. it's just funny to me to see my own fish do what "they'll never do" according to some people...sigh.
Every morning I feed a mix of frozen foods...blood worm, spyrolina brine shrimp, glass worms, tubifex, mosquito larva and whatever else I may have in my freezer at the time. Boy do they love the morning!
The baby angels which are in a different 55g get all of the above including cyclops and daphnia for the smaller ones. The bettas love it all too, so we're good