Ive been somewhat successful with these. I doubt he only had four so check around your sump. Is the male eating now? if not he's still holding babies. If you dont take them out the likely hood will that they will be eaten, also as you probably have noticed their not great swimmers, so they will get sucked right up into a pump and die. A breeders net will work for a temp. home for now.
As for trying to raise them, they're pretty easy to raise, baby brine shrip work well for feeding.
If your male is still holding, and you would like to recover the babies, be sure to check back everynight after the lights turn off. Unlike alot people think, they wont release them all at once, they usually release them over 1-3 days, as the fry become fully developed.
And if you have any question pm me and ill do my best to help... Its alittle work but very rewarding... i like to say the babies are like baby pandas to my family, i tell them im bringing them back from extinction lol