Water conditions (PH, GH
, And KH
, are important for GBR to start breeding.
They should be conditioned with live, frozen, and even some FD foods to help egg production.
Coralbandit has a great thread on breeding, and rearing fry. He has certainly done his homework, and has had good success with them. I used basically the same theory as he did, and have had some success with them. I haven't had them in years, so I hope I can remember the tricks. Getting the fry to survive and then to early adulthood is the tricky part.