hmmm found a thread on planet catfish that AleGer wrote up a couple years ago about sexing. Might have a slim hope in a pair but looks like they still have a lot of growing left before they can be sexed propely. Heres a link if anyone wants too check it out.. Thanks folks
Good to hear you got a spawn from them. Hopefully they will go the distance next time for you. The ones I have male tends to have a different pattern on the head to the female and you will also notice the difference of the pectoral fins shape. Always easier to sex after they have breed. You should have just waited...lol