So I am almost done completing my first 30 gallon tall vivarium. I plan to house 3 tinctorius azureus. I have been reading a few forum threads that have mention that when housing this particular morph it is important to have a larger male to female ratio or else the females will compete and potentially kill one another. Having said that, it seems clear that I would need to have 2 males and 1 female in my new vivarium. I was wondering if anyone could chime in on how big of a concern it would be to have 2 females and 1 male? Most vendors sell juveniles and so I will not know what sex I am receiving until they mature. So, does this mean I should find a vendor that could provide mature darts so that I ensure I get the ratio of 2:1?

Thanks guys!!