Thanks. The lone survivor kept escaping the breeder tank so I gave up and let him stay in with the big fishies. There are just some half-grown rasboras and a single shrimp in there so hopefully he can stay clear of everyone. I also put in some plastic hornwort to float so he can hide in it (and he is). My only predicament now is how to feed him without alerting the other fish to his whereabouts. 
