I'm just thinking about this mixture. I don't know about putting these together but it never hurts to ask? If say I had a 55 or larger gallon aquarium would these mix well? One site I was at said they could exist together.
it would really depend on the footprint of the tank.
appolo sharks are a schooling predator that will reach 10" (depending on species)
they are very fast and need a lot of room to manouver.
aggresion wise yes they would be compatable with convicts, however I think that adult apollos
would happily view the convicts as food.