Any tips on things the threadfin cardinals will eat?

[pfan151]

I have a group of 7. They are doing pretty well but they will only eat live brine. I've tried mysis, nutramar ova, and reef frenzy. So far even if I mix the live food with the frozen they won't eat the frozen. They will take it in and immediately spit it out and search for the live brine. I've tried not feeding brine for a few days hoping they'd eventually give in but I gave up when they started looking too thin.

 

[kenith]

Cut back on the live brine to every other day. They'll eat the other foods when the start to go hungry