So I heard that matterhorn is an unstable plant but I never thought it was so unstable.
One fenotype are doing well but plants from another mother are struggling.
I checked the condition every day and every day the EC dropped and the pH rose. Which meant eating, but still showing problems on the leaves. During this period I made a mistake with the water temperature, namely when the water temperature is above 20 ° C the oxygen in the water drops drastically and these were the beginnings of my root problems. I didn't know it then, but later root rot appeared.