drobbyb
Bowhead
I would try hatching some brine shrimp like helterskelter suggested. They move around a bit and stay in the water column for a long time. I haven't met a fish yet that won't eat live brine shrimp, even the newly hatched kind.
Got some news. First thing, I went dipnetting about two weeks ago again and caught and kept two more swamp darters by accident. I was afraid they would starve. Well today I got my freeze dried bloodworms to sink. My two original darters did not eat any as they were not near them. I think they are eating something because I have had them for more than a month already and they are still alive. My two more recent darters actually ate them. Now they do not even wait to see if the worms are alive anymore, they just go crazy for them.