I've never had problem with frozen blood worms. i fed mine blood worms (live and frozen) and frozen brine shrimp. they get to eat twice a day and devour everything. i introduced shrimp after they grew from 2" to 3.5" and they took it right away.
i'd say try live blood worms if they don't take frozen well. but you don't have to use feeders at all,............ that's my opinion and experience
i'd say try live blood worms if they don't take frozen well. but you don't have to use feeders at all,............ that's my opinion and experience