I have a black molly that is pregnant. she has squared off. She had her last batch at the end of july, around the 25th. i'm keeping an eye open for the next batch. how soon should i seclude her from the other fish and move her into the breeder net? last time she had fry, i only managed to save one, because i was unaware that she was pregnant, and by the time i found out she had fry, there was only one left. i'd like to prevent that from happening again. help please 