Since it is a FH, it means a hybrid between A trimacutus and another, maybe a Vieja? maybe Herichthys.
In nature Trimacs are predators living mostly on insects, and snails, occasional fish, but also, when the stomach contents of wild individuals were examined, plant matter.
Leaving out the feeder fish, (for obvious communicable disease prevention reasons), insects such as gut loaded meal worms, crickets, and earth worms would be good additions, but also Spirulina pellets.
And because they may be crossed with Vieja, or something else which have vegetarian tendencies, a high algae (spirulina) pellet may be even more important.
Hybrids "may" be disease prone because their digestive tracts (that evolved to need vegetable matter to clean the gut out (fibers material)), as opposed to the high protein pellets sometimes exclusively given.