Moderately difficult but not like atf. It can be done. Will need to get a group and even mix with hujeta or chalceus. So it’ll help teach the red cudas. Gotta get a powerhead and throw food in the current. Other fish will go for it and so should the cudas.
Someone’s gotta mix live food with cut up tilapia in a similar shape. Eventually can reduce the number of feeders till only prepared food available.
Growth rate is slow. 1/2 per month till about 6-8inc and then slows down.
Alternatively can add hujetas or chalceus as a substitute for the red tail cudas.