Soil requirements for duguetia

[svennagel97]

Hello,
I have a seedling of duguetia marcgraviana and recently I ordered seeds of duguetia lanceolata. The first seed started germinating. Do you have any recommendations in what kind of soil they grow best in? I thought of good draining soil, using lava rocks, sand, perlite, akadama, spaghnum moss and some worm cast. Do you think this mixture is well suited for duguetia? What are your experiences in growing this rare plant family?
Would love to hear your experiences and growing tips in general.

Regards,
Sven