New 15G Tank! What To Breed!?

[Brahmza]

Hey everyone! I'm looking for ideas on a small fish to breed in a 15g tank. I'm looking for a fish that will raise their fry, or at least somewhat participate in raising the fry. Currently breeding Multies in a 20g long and German Blues in a standard 55g. Any ideas would be appreciated!

 

[RCA]

Not sure of tank size needed or breeding rituals but some fish that I like that come to mind are:
Corys - Pandas, Adolfoi (Adolfo's Cory) - one of my favourites and not that easy to get hold of.
Pseudogastromyzon cheni, from the Loach family, apparently breed quite readily in the aquarium.