you will get the fungus if the parents are not much good at looking after them.
Most breeder will pull the eggs out and put then into another tank (no need to be large, smaller is better at first.).
Add a few drops of meth blue, this will help to stop the eggs from getting fungus. Also no need for anything else in the tank other than an airstone bubbling slow over the eggs. after a week add a small air powered sponge filter.
Not the only way, but one of the better ones i think.