If you check out this link, you will see one of Oliver's new designs for which he has used ADA AquaSoil Africana (powder). A picture tells a thousand words... the sequence is informative, not only with regard to the substrate.
This tank was more a "test-tank" or "new experience" tank
I get a pot from a new small Utricularia sort and want to test it in this tank.
And I have much space for a small other plant. So I choose HC, I don't know if it was enough light for this plant. I'am curious if it's grow well...or not
This was also the first time I use the AquaSoil Powder as main bottom.
Normaly I use it only as last layer over the normal AquaSoil.
It is a shame they are not available in the US. It's actually the same for us in the UK. I looked into buying some from them and really act as a wholesaler in the UK but the sheer weight and quantities resulted in me not going ahead with it (no space left).
Anyway, you would be surprised at how reasonsable the prices were though and also what a wide range they have for not just rock but also wood.
but I'am not 100% satisfied with the Hemianthus grow...to many holes...hard to get a real carpet in this tank, especially in the right and left corners. I think the light is a little bit to less...but I try my best to get a better result.