That's a "Busy" looking worm farm you got there Ship.
No more often than I use worms, I don't know if it'd be worth my time?
Which worms would I be raising for Catfish and which for Crappie?
I raise my worms to catch Gills and Shellcracker. Redworms and Red Wigglers are my worms of choice. They will catch cats but I do not fish for them. I will tip my jigs with wax worms for Crappies.
Aquatic Species Removal Engineer.
May God be with you. Keep CALM and STAY ANCHORED with your faith.