What worked for mine from the past few days is blood worms and live black worms.They will only nibble at first and then after some time they realize its okay and eat more. Now they are eating a lot better than when I first got them. I think it was just the shipping stress.
I actually had to shut my filter off at feeding so the worms sink and then when they start eating I turn it back on. But I have 2 filters in the tank so one is still running and I only shut the other off for less than 5 minutes. i wouldn't want to kill the bb.I just feed on one side of my tank.
Then I put both filters on one side yesterday and now leave them on and running during feeding and its working.
Hopefully that helps.
I actually had to shut my filter off at feeding so the worms sink and then when they start eating I turn it back on. But I have 2 filters in the tank so one is still running and I only shut the other off for less than 5 minutes. i wouldn't want to kill the bb.I just feed on one side of my tank.
Then I put both filters on one side yesterday and now leave them on and running during feeding and its working.
Hopefully that helps.