My females were always smaller and a bit more short-bodied. The males tend to be more long with a taller, more squared forehead. Based on the body shape in the pictures, they both appear to be males to me. You could go get two or three small rainbows as long as your tank is adequately sized. I kept mine in groups and it helped take the aggression off of a single submissive fish.
And yes, they are notorious snail eaters. At 1" my group of rainbows wiped out about 12 of my nerite snails. I had no idea they'd eat them, especially at such a small size. Lesson learned!
And yes, they are notorious snail eaters. At 1" my group of rainbows wiped out about 12 of my nerite snails. I had no idea they'd eat them, especially at such a small size. Lesson learned!