Just sharing my new "pets". Taken them out of the tissue culture vials last weekend. The original leaves (reddish colour) seems to have died down but in it's place new leaves (greener leaves).

Looks like this species is quite a fast grower. Quite happy about that. Now to try to get it to turn all red.
Just to avoid misunderstanding, the media is not all course sand. That's just the topping. The media is about 2 parts sand and one part sphagnum peat.