I am sure you will get varied advice on this. "In my opinion" you have two options and either is correct. These are juvenile fish and it will most likely take them several tries before they successfully hatch fry. So with that said you can 1. leave them in with the others until they get things right and hatch wigglers, or 2. separate them and let them "practice" on their own. In the mean time do your research on the demands of raising fry once you get to that stage; meaning water changes and quality(more frequent) and feeding/foods. If you plan to do baby brine(BBS) then get your self set up to hatch BBS daily or every two days....2 liter bottles, air pump and air stone, siphon, strainer, salt for brine, etc (there are other ways of doing BBS). And lastly start thinking about being successful and needing yet a third tank once you can move the fry from the parents. Successfully hatching and raising fry is very rewarding but demands lots of attention and work. Good luck!