Will my female bettas

[Nuttygal! :0)]

My 3 female bettas live in a 5gal at the moment, as they have for the past few months. Recently, one of them has been a bit agressive and nippy towards the other two. I have 4 other tropical tanks, but 1 has a male crowntail, 1 has his fry, and one of my two bigger ones is over stocked, so this only leaves 1. (I have goldifsh tanks, but obviously they cannot live in them! ) Anyway, I want to move them to the remaining bigger tank, so they have more room, and so hopefully they won't fight as much. It had 4 gouramis, some male and female guppies, 3 corys, 2 black ghost knifefish, 2 plecs, 2 angels, 3 platys, 4 silver-tipped tetras, and 1 shrimp. Would they be ok with these fish?

EDIT: Ugh, I really have to stop waffling so much in my posts...

 

[BettaMomma]

Personally, I wouldn't put them in with the guppies.
I have never personally even had guppies, but I've just read several posts where people have asked about putting them together and from what I've seen, guppies and betta girls don't mix.

You might consider getting one more betta girl to even out the aggression?
You'd have to probably take them out and put the newest one in, then put everyone else back in - and in some cases you'd need to rearrange the tank, if there are problems.

Someone else might have a different opinion, but that's probably what I'd do.
I just had 4 girls living together peacefully (they are in a 10G though) and added a 5th one back in and they're doing just fine.

 

[Sorrell]

Get a 10gal or three seperate bowls/tanks. They shouldn't go in that community, and a 5 is really too small for the existing girls.