What do you grow in lava rock/terracotta chip?

[greengarden]

I've just finished repotting my phals into terracotta chip and I really like it, it's easy to tell that it's wet and it's got great air flow, plus it's relatively inexpensive too. So I'm wondering what others grow in this sort of medium as I grow orchids from a lot of alliances and I like the fact that it won't break down so it reduces the need for repotting when you have hundreds of orchids to worry about!