There is a lot of habitat information and photos in the culture article I wrote for the OD in 2020. Photos of the roots and the surrounding area. Pearcei is a warm grower and yes, you can cultivate these in seedling bark mix, not too open, and let them start to dry between waterings. Bright light and even direct sunlight are the norm, as with several other species of Phrags. When not submerged the plants subsist on humidity after it rains. There really is very little around the plants to retain water. Some grow in accumulated river sand but that drys quickly as well.