I decided to test this out, and bought 4 white cloud minnows and put them in with the calvus. They were a little interested, but no hunting behavior. I also found a thread on a different forum where one guy said he puts his 1/2" cyp fry in with his WC group of adult calvus to grow them out. I put my calvus in the new tank yesterday, and so far, so good. I'm watching closely though.
On another note, I think I'm going to lose a julie because there's one that all the others pick on. I haven't had transcriptus in a couple years, but I didn't expect them to single one out of the group.