With the complexity of your scape and the amount of lead litter you have I'm sure you'll have plenty of survivors. I can actually potentially see you becoming overrun with them if they continue breeding...
Yes,that had crossed my mind. Trying to catch them would be a nightmare in my tank ,if they do all make it.
I do like to see fry survive in communities with out any help from the keeper though.
It's one of the hobbies nice aspects imo.