Yep, sand with leaf mold stuff mixed in seems to keep mine happy here. Mind you there's LOTS of leafy stuff mixed into the sand. Huge old oak trees that drop a thick carpet of leaves every spring. Going out to see if I can find any of my Neo's for Jeanca's interest.
Sorry, I don't know the names of most of these, they were all gifts, or were here when we moved into the house. First two pictures, I rescued this from a tight crutch of an oak tree out front. It was quite red and stripey when it was out there, but developed into the stripey mode as it settled back and opened out into a more normal Neo form. It seems to be striped when younger, and develop plain leaves when it's getting ready to bloom.
This one is a 'nail polish' with red tips when it's blooming but it's getting rather faded now.
My favorite of the Neo's, this purple one has made a nice wide clump, from one tiny start from a friend.
No walking by these gawdy flowers today. Billbergia pyramidalis 'Kyoto' almost full bloom. I'm kind of sad because my kids are all coming to visit next Monday and they'll be gone by then.
And one of my Billbergia 'Hallelujah' squeezing out a bloom between a rather squished bunch of leaves.