I was talking to a guy in the pet store the other day and he suggested that I put a male fancy guppy in my tank. He didn't work there and I think he was going completely off of how the fish looked but I thought I'd ask anyway. I couldn't find any information on guppies temperament or if it would be cruel to keep just one but it seems like there would be problems keeping a single male guppy. I relay have no idea because I've never owned on and I don't intend to at the moment; Just because a guppy is big enough to hurt some of the fish/invertebrates in my tank. (Started stoking the new tank BTW.) That and they breed like mad so I could only have one. So was this guy telling me to do something stupid or was it maybe something I should look into to liven up my tank.