Thanks Master!
I hope everything will works well. Might not be visible but, it was a lot of work in it. It was an old basement, what nobody use in the last 30 years.... (it was my grandfathers basement is the little garden hous)
I complety clean it (8-10cm sand in the ground, around 600kg tile, many steel and waste). It has only a small old ladder, it was prity nice job to clen up it alone.
I'm not a mason, but I concreted it in the bottom around 5-6 cm. I plastering the walls with watertight plaster, and build the box after 1 week drying. So it was not eazy, but I find the happy in this sh*tty job in this unbearable heat.
I just blame myself to grow in soil. I think hydro is like "nuclear physics", but goddam, it isnt.

Yesterday I read many from DWC, and find many discrebe, how to make DWC in the cheap way... So I'm prity sure I will grow in DWC in my next run.
So this is the story, thanks for the kind words! :group: