Hi again, Carl
Good to hear that the remaining fish in your tank are doing well - I’ve lost my share of flavi´s with this combination, so I always become a little nervous when I hear that these two species are combined
No, of course it’s not a mistake moving some of the X. papilio if both tanks become more harmonious by this
Just avoid moving them in that time it takes to form stable pairs, as the pair bond between a couple that hasn’t spawned generally are rather weak
Yes, you can sex them in that way if they are mature, but it could be quite difficult, as the fishes are small, so is the difference.
Do you have “Enjoying Cichlids” or “Ciklidboken” as it’s called in Swedish by Ad Konings? There’s some pictures of genitals of a Xenotilapia spp. you could compare with. I have myself done it a couple of times with various luck, but I personally hate catching Xeno´s and avoid it unless it’s absolutely necessary - they are so jumpy and delicate in the same time.
If you try to sex them this way, please inform us how it went.
By the way, do have some pictures of your Xenotilapia? I would love to see some!