I have 3 sunset platies being bothered constantly buy 6 red wag's platies & 8 fancy guppies.

I put the sunset's in a breeder net & everything seem to calm down for a week. I just got done with the weekly water change & there back at it again. I do not want the sunset's to get stressed. what should I do I have them in a 90 gallon tank???

thank you for any information given