Mold/ fungus/ bacteria in the medium?

[Sofifi]

You're all so great, thank you everybody!

I've drilled more holes and I'm going to do everything else that you suggested and make the medium less tight. I'll also consider repotting in smaller pots, these are really too deep.

As for the water it's soft here (Sofia, Bulgaria). pH 7.4, kh 3-4. The fertilizer used is NPK 3:5:7 with the addition of B, Cu, Fe, Mn, Zn.
It's the only one I've used so far but might try something else for a change.

Thank you once again!