Thanks a lot. PH is at 6.2. Hesi TNT 40ml/10L
I started with the full scheme (50ml/10L) -> I got curled leaves.The one on the pictures are at this age.

But the overview looks healthy ?
By the way I topped three of the four plants in the rear line. Hope they will do fine.
I plan to switch to 12/12 on New Years Day ;-)

Hope my clones will do fine :-)
But I think so. Clonex and a Heat Mat should do the job ;-)