Ok So I have been thinking about doing a guppy tank, I have seen some really great varieties and enjoy the colors. Im torn as to which of the tanks I have I should use for them. I currently have a 29gal and a 20 long that are empty and awaiting stocking plans. Both tanks are planned to be fully planted tanks and over filtered from the start. After that I just dont know which one to use. I do plan on having only one species of guppy in the tank to keep from really getting things mixed up, maybe later I would try my hand at a true breeding project but for now its more of an enjoyment. That being said, I am planning on holding a 10gal tank as a potential fry tank. So which tank would you go with, and how many would you stock in that tank.