sometimes first time dads get confused and eat the eggs, if I am very worried about a dad doing that I syphon up a few eggs and place them in about 1 inch of tank water in a flat tupperware container that I float in the spawning tank. this way the dad still gets some eggs to practice with. once the eggs hatch and the fry are free swimming remove dad and very gentley pour the babies from the tupperware in the tank.
then feed asap and care as normal....just do not feed the babies while they are in the tupperware container...the water will foul quickly and kill them.