<span class="link_user">@Irpuck</span>, Thanks! :smile:
I still think it somehow came from the badly washed coco, because now that everything is properly rooted and the plants are basically drinking hydro style, all the issues disappeared.
I think my mistake was not flushing enough water through the coco. I probably only used around 2x the pot volume and then kinda half-assed measuring the runoff EC and accepted it once it was around 0.8 :sweat_smile:
Would’ve probably been smarter to rebuffer it properly with pH-adjusted water and some CalMag haha