Originally Posted by
Discus Origins
My vote may just add more to the confusion lol. I find that wilds spawn more readily in a biotope tank with other discus, it's the presence of other fish that strengthens the pair's bond. I suggest removing the tetras and corydoras from the tank as other discus will not be eating the fry in my experience. At least you can allow the attachment of the fry and experience the normal progression of a spawn for as long as possible before removing the fry to their own growout tank.
But, if you want to have the best chance at raising spawns I suggest putting a wild pair into a larger tank than a 27 or 29. They seem calmer in a 55 gallon versus a 29 gallon. When I had a pair raise fry in a 29 they started fighting soon after the fry attached. The same pair in a 55 gallon actually lead the fry around the tank letting them feed even on the adult food that was in the tank. It was a cool sight to see.
I prefer for my pairs to at least spawn twice and have fry attach prior to removing them to their own tank so the bond is established.