good advice, but i normally keep more than 1 female as spare, or you can stick to 1 and have divider handy just in case the male get boisterous post breeding
I have also found with my mated pair that the males can be very boisterous towards the female. My male was constantly harrassing my female to the point where she had a few split fins and missing scales. I wouldn't really call it fighing though, it seems like she wasn't as ready to breed again and he was getting impatient lol.