Looks like a Colombian variety. They thrive in groups, IMO at least 6-7. This plus abundance of hiding spaces should bring about their more natural behavior.
Peruvians usually have a little bit larger spots and less of them but most obviously with a better black-&-white contrast. They are reported to grow smaller too.
From experience and from paying attention to what credible people and sites say and then looking for confirmation of their words and, hence, further learning.