Actually, haven't had much success as of late. It goes in spurts I think. The last batch I only had about 5 hatch, the rest of the eggs turned white, which means they either went bad, or the male hasn't got the fertalizing down yet, lol. They are still a young couple. This is their 4th spawning now. And I left the eggs in for 1 day before removing, as the snails found the egg bed. The male used to attack me when removing them, but now he's used to it and know's I'm not threatening them, so he just comes up to me and rubs up against my hand, as well as the female. Just like they do when I'm re-arranging some plants. And occasionally he'll attack my hand, but not often. It's interesting when they come up to you and rub your hand like as if they were flashing, but with no threatening coloration like they are PO'd, but a welcoming rub. They are my fav pair. They are just too cool.
As for the 5 that hatched, I've seen 2 swimming around still, possibly 3. Haven't kept a real close eye on them, but I know they are still there, saw them yesterday.
Another thing that's making it tough is they lay the eggs in the gravel, which makes retrieval a pain in the rear. Even though I have a nice piece of flat granite in there, they chose the gravel. And when I place the granite where they lay the eggs, the next time they go somewhere else, lol.