Thank you for the replies.
Looks like one of the females is already pregnant as she's quite fat.
I do have an old 2ft tank I could move fry to if any survive.
I can see me asking for more advice pretty soon when I want to upgrade, although I love my Edge for looks, may just keep a few male guppies in that in the future
I've lost a couple of days already reading this forum, so many beautiful tanks to admire, & great advice given