Almost everything I have started out on live feeders, usually guppies. Then as they aged moved up to bigger feeders. Switched them to worms as soon as I could, then to cut fillet and still trying to feed pellets. The only fish I have that will eat pellets is my RTC, go figure. So far everything else refuses to eat and just makes a mess. My brachyplatystoma juruense still refuses anything but worms and live feeders even after starving it for 4 days. TSN= cut fillet and feeders, Achara just about anything, Monos cut fillet, worms, live feeders. Bichirs live feeders and cut fillet. Whatever I can get the fish to eat I rotate trying to keep a balance diet. Just today I found whole frozen tilapia at walmart and will start feeding it hoping the skin and head will fill any gaps in the vitamins. The pellets I use, believe it or not, are Purina Game Fish Chow. Did some research and all looked good. Seems to be working as well. Have been using it for a year now and no ill effects. The only problem I have with it is that it floats. Sometimes I regrind and reform the pellets to meet my needs and then they sink and I can adjujst the size as needed. Looking forward to the day I can get all of my fish on a rotation with the pellets because of the ease of use and cost, about $25 for 50lb. I use feeders very seldomly maybe once a month or so and then they only get a couple each. I would really like to find some crawfish for mine but so far the only thing at the local walmart is already cooked and seasoned. Hope this helps and good luck.