WOW did anyone read that she has FANCY GUPPIES in there? im sure that it will be OK, but i had a female betta who totally tore up my guppies because of their tails, so id be careful if i were u!!
I've had female bettas with fancy guppies before, no problems. You must have had a trouble-maker betta. But, you should always watch to make sure they get along at first.
LOL my female betta does the same but the minute I put her in my community tank she just about tore the place up! She attacked anything that moved! Be very careful adding just one female betta... I think they do are more peaceful if there is a few females together so they can establish a ranking. Good luck!