So far pretty much bloodworms. I used to feed some brine shrimp as well. I've introduced little pieces of krill, no luck with that yet. I may try a small red wriggler soon. The growth rate seems slower then it should
My ornate seems to really like bits of frozen/thawed tilapia, with the occasional chunk of beef heart. He's doubled in size in the last month, so maybe that'll give the growth you're looking for?