You can try, but oftentmies these nets stress fish out severely so it may be counterproductive. Really, livebearers do fine in tanks without all the trouble. They breed like crazy. They can also store sperm for months at a time, so she is likely already near pregnant again. If you want to ensure a certain pair breed then you pretty much need another tank, otherwise nature will pick for you and you just deal with the results.mr.amateur45 said:ok, 1, i dont have anymore room 4 another tank, and i wanna buy live brine shrimp. i have a little net for keeping other fish in the tank but seperate, can i put them both in there til they breed?