I personally don't feed pellets/dry foods, as I don't like them. The diet for my bichirs/ropefish consists of tilapia, rainbow trout, white pacific shrimp, krill, silversides, and the odd bloodworm cube. I cut everything to size and mix it up in a bowl, then I add in some Boyd's VitaChem (freshwater version). Then I load it all into freezer bags, flatten it out to about a 1/3" thick, and store the sheets of food in the freezer.
To feed it I break off a chunk, defrost, and toss it in the tank. I don't dump the thawing water in the tank, I scoop out the food by hand and throw it in bit by bit so I don't overfeed. Excess goes to the catfish.