Could i fit two in a 2.5 gallon? Like a male and a male, or a female + male? Whats better/most recommended? 2.5 is the biggest due to my budget =[
For a 2.5g get a trio, 1 male, 2 females. That is a small tank though. I wouldn't worry about the fry, in that small of a space the parents should eat them.