It's too young for a sure ID, but maybe Polaskia chichipe.

Agreed. Well-rooted cuttings.

Now I want one.

Seems these can be grown from seed, according to this thread: https://forum.bcss.org.uk/viewtopic.php?t=168477&start=10 Apparently it's more elongated than the common Peanut Cactus, as well as shorter spined - otherwise very similar. Easy to grow, good choice for a first cactus - many rare speci...

It doesn't look bad - but you need to have a uniform mix through the entire pot. See: http://www.cactiguide.com/forum/viewtopic.php?f=25&t=9222 Even if the nursery soil didn't contain too much peat, the rule still holds - unless you're using the same mix, you need to remove the old mix from the ...

Also, many random hybrids around, species in this group cross readily.

Do you something about them: Do they need a really cool winter just as Stapelia grandiflora, leendertziae or the like? -- I don't want to loose it immediately because of a too warm or too cold winter. I've never grown it, but from what I read its cultural requirements are no different from those ot...

I was just looking at your pot Solj3. It looks pretty big. These plants like to be root bound and I'm thinking you have overpotted your plant. I had mine in the 4" pot it was purchased in for at least 5 years. It was solid roots and almost no potting mix when I repotted. I went up in size on m...

That Consolea grows to tree-like proportions.

Wow, how big is that thing? You ever eat the fruit?

It looks like its pot is too small, large columnar cacti like this need a wide root run.

This is actually a good time to re-pot - just don't water until spring.

Stapelia scitula perhaps.

I use a blend of 3 parts pumice and one part good quality potting soil, pasteurized in a microwave. It does tend to grow algae, but the algae is harmless to the seedlings. Cactus seedlings make strong root growth in this mix.

The red pigment blocks sunlight. The soft new growth is not as dense, so the sun would penetrate more deeply than it does on mature growth - that's my theory, anyway.

Ship them dry - even a that size they can go months without water and it won't hurt them.