I think the Auto NL is finishing to stretch. I opted for some LST treatment so she can take more light on all the secondaries.
I got electronic pH and conductivity testers. Playing with them, and slowly filling up a table :)
@goarilla, Thanks for the tip, it usually dries up (or gets absorbed) quite quickly, but I'll definitely pay lots of attention to it in the coming weeks. I'm even thinking to fit a transparent plastic bag over them if and when forecast seems too wet for too long.