Rdwc take 3

Penso che l'argilla espansa non va bene ... Trova un argilla apposta per Idro con palline sferiche e non deformate ... E si installa una pompa per annaffiare dal alto finché le radici non arrivano al acqua e soluzione

4 small water pumps, will do the same work as you manually pouring. Better even. But I'll admit probably not the most Energy efficient..

Increase your water level or pour water into the clay pebbles a couple times a day They're probably too dry

it's a runt but probably not genetics, probably there was a lack of cal mag and especially a lack of chelation agents meaning the roots didnt get prunned enough so the root system stayed small, small roots small plants. In nature a plant's roots are always getting naturally prunned then regenerating, and this regeneration pushes out new growth also above ground. if it wasnt in flower i would recommend root prunning which is where you litterally clip approx 10% of the roots off with a pair of sizors, crazy but it works surprisingly well. Hope this helps ! 🚀