I have one of these, I got it last year from Violet Barn. It has done pretty well for me in a mix of cactus soil and perlite, about 50/50. This was one of my first aquisitions, maybe not the best mix but it seems alright. Next time it gets repotted I may change the soil. Does have long stretches of zero growth, especially in the winter months. Bright but indirect light, and it seems ok with getting a bit dry between waterings.

It's a relatively slow grower for me, but it rooted easily (and I was rooting in the fall, which is a disadvantage).

I used a super-fast draining mix of equal parts pine bark, calcined DE and granite chips. The ingredients are pretty far out, but any fast draining mix should work, and so should semi-hydro.

Who's Andy, by the way?

Thanks. Andy is "yellowgreen2u" on eBay.

y not message andy and ask for his suggestion.