Hi folks, I was growing  my first plant and it looked absolutely stunning, very healthy and vibrant until  i got mould on the stem joints. Probably due to over watering and substrate too compact.  Cant change it now as its huge and wont want to damage roots.  Instead I tried to loosen and aeriated soil best i could.     The affected stem has caused it to wilt.  I presume because its being starved from  nutrients etc.  I will try add a photo.  I take it there is nothing I can do about this. I have tried anti fungal spray on affected areas and used a spray on leaves to stop white mildew.  I fear the worst.