would it be cruel to a female betta...

[guppy1]

to go from a 10 gallon back to a 1 gallon bowl? Shes just to aggressive towards the guppies in there.

[blackrosedragon]

In my opinion yes, just because of the difficulty in managing a 1 gallon anything. The temperature is usually in constant flux, and hard to filter easily. I have a one gallon "show" tank, and the temp was hard to manage, but it was easier to filter and heat than a bowl. I kept a male betta in it, but if she is too aggressive, you may look into adopting her out to someone. I currently have six or seven girls in my 55, all of which are doing okay. I just got three in that are tworn to shreds because someone left them in a gallon bucket together for transport.... now they act like a little gang and school together. werid....