<span class="link_user">@wolfvb</span>, yeah.... im pretty sure the soli is to hot i use it now 3 times and i didnt flush it before reusing the earth.
after the first watering i got allerady salt buildup on the surface and if i remember not wrong the VPD was always 1.2 not the best start.
I will make some sceenshots from the first weeks in my app.
i think it was my fault more or less.