I recently started a small aquarium with two male guppies. At first the guppies seemed to get along great, but after the first few days the larger of the two began to bully the smaller one. I am not sure what is causing this (the LFS
assured me having two male guppies would be fine) but I am really worried about the smaller fish. His tail is looking quite ragged from being bitten. I know that adding females would help with the male aggression, but I really do not want to deal with the fry. I have separated and reintroduced the bully, but that didn't seem to help (I don't have another tank to keep him in long term either).
My question is - what should I do to try and get them to stop fighting? If I need to, I could get a bigger tank with more fish, but would it be better to get more male guppies or would it be better to get a variety of fish? I just would like to stop the aggression and prevent any other aggression in the future. Aside from adding females (which I don't have space for in my tank now), what would be the best course of action?
Thank you in advance for your help!