Hi,
Just to provide a feedback:
I used finally a mix of Flourite Black Sand and earthworm casting (bio label) boiled, topped with a layer of Flourite Black Sand, following barr method
I used water and mulm from my cycled 60gal EI tank: so slight NPK and micro
I vaporize regularely with that water too
Here's how it looked on start
2 weeks later (sorry, but condensation limits front shots. I don't like to remove it to avoid messing the glass with some left sand):
The recipient is to help maintain good humidity. And 2 calibrated Hygrometers to monitor hygrometry reliabely
The tenellus didn't rot and looks great. The P. Helferi grew in size significantely. The C. Parva is nice green and didn't melt.
Still waiting for emerged leaves to appear before claiming success
