I have 3 guppies, 2 are yellow, one is cobra. I'm kinda hoping I have male and a female, but I can't tell the difference.
From the pictures they all look male. Watch for aggression though, since you have a smaller number of males and no female "distractions" for them to mate with
Ok, I'm going to my lfs soon, I'll get a female (or try)
I did have 2 other guppies I got from a pet store, they died right after I got them. Pet store sold me sick fish! Their tails lost their color, and they died. I did quarantine them when I saw their tails.
They didn't look sick when I got them
I would not suggest getting females, they will over-run your tank with guppies quickly. Do you have any other Fish in the tank? If so, what?
IMO you should up the number of males to 5-7
I have 3 guppies, 2 yellow and one cobra, I want them to be even, so I'll get one more cobra guppy. Do you guys have any suggestions for a different type of guppy?