If they are not eating try a beefheart cube, they shouldn't be able to resist. The dels should come around in a couple of days, I bet they are just getting used to the new surroundings. As for pellets, it is easy to get them onto pellets, expecially sinking. Try breaking up hikari massivore pellets, or even try hikari carnivore. My delhezi have a liking for floating hikari gold, which is actually for my severum. My bichirs eat broken up massivore, shrimp, smelt, chopped walleye and perch filets, that I catch from the lake, and coming up here in the spring I will be netting emerald shiners to freeze for them, they spawn in the shallows by the millions in the spring. Worms are good too, to add a variety for their diet. Even after feeding the "fleshy" foods, they have no problem eating massivore nuggets, some of the species actually seem to prefer it over some of the other foods I suggested.
and lol.. I was wondering, also what the yelling was all about!