picky eaters

Got a ropefish recently. He’s been doing okay except he’s very picky. I’ve tried: fluval bug bites, homemade fishfood (beefheart), chopped up earthworms, and freeze tried tubifex worms. I can’t do bloodworms or shellfish as I’m severely allergic to both :(. I’ve only ever seen him eat once...

I have two bass that are around 7" now and all there eatting is blood worms still and here and there if I mix beef heart or fish eggs with the worms they will accidentally eat them. But I really would like to get them two eat krill so i can but them in my 240g with a 16" arowana. And two...

my flowerhorns are really picky eaters.. they will only eat beef heart?? I buy them pellets and it’s said they are scared of them?? I recently bought them okiko platinum pellets but they just turn their noses up at them but as soon as I bring them the beef heart they eat it?? I tried not feeding...