Hey! So I have a new 10 gallon tank ready (still has to be cycled and everything but you get the point) for some new fish! :;banaman I was going to get 10 fancy guppies but I don't want them to breed so I was thinking of getting all male guppies. I just wanted to know if they'll attack each other. There's some controversy on whether they're schooling fish or not, but I do believe that they are schooling. I wanted all males instead of all females because I heard that the males were more colorful and more active, which would be great. I'd just like to hear some input on if this is okay as far as if they'll attack each other or not. Thanks!