Moved to the catfish section.
Leave the juvie brislenose plecs with the adults, the male will care for them until they are swimmers. Once that happens they are pretty much able to care for themselves, feed the same as adults. Unless you have larger fish they should be fine, platys & such will not bother them. If you do need to move them don't bother with a net, put a jar or other glass container in the tank with some food in it. Wait a while, they will be eating, remove the jar plecs & all. You can then transfer them to another tank.