after you indroduce the pair to there new tank it will take them a while to feel confortable for them to breed.
I suggest a terroccotta pot turned upside down for them to breed on, or a peice of slate (I don't like this one as it tends to fall down).
Also, make sure that there is atleast one cave in the tank for either of the parents to hide in as the pair will go through many stages of, "these are my babies, get away." But they should become best of friends after a couple of hours (Mine do this often, but they always keep on breeding).
Inbetween spawns make sure to feed them many different kinds of foods as this will entice the female to produce more eggs.
I would leave the first 4 or 5 spawns in with the parents becuase, you never know, they might turn out to be the pair that will raise them to free swimming stage and will do half of the work for you. If not that is ok. If the parenst do decide to care for them it is very fun to watch. They will fan and mouth the eggs to replenish oxygen for the eggs. If you wake up one day and the eggs are gone look around the tank, they might of movied them... Mine do it atleast 3 or 4 time before the free swimming stage.
If you wish to dose with methylane blue (I don't know if I spelled that right), that will reduce the rist of the eggs fungusing up. But I don't and I never get fungused eggs.
After 1 week in with the parents I move the fry to a 10 gallon with a sponge filter and feed rotifera 3-4 times a day.
Here is a good video to watch about raising the fry...
Part 1:
http://www.youtube.com/user/Jazzy78910#p/u/1/BBF4CfUCVpY
Part 2:
http://www.youtube.com/user/Jazzy78910#p/u/0/3Fs6lhBn6V0
This is how I raise and breed angelfish. Others might have a different way that works for them. Part of breeding them is finding out what works best for you.