What dont now any thing about strain soil nutrients or that.
But what is the first thing you think?
The burnt tips is nute burn
Nope; need a picture of the whole plant in natural (white) light. I’ve seen this on problem plants and I’ve also seen it on an old beat up fan leaf about to be ‘retired’. So; I’ll wait for that picture.
Have like stop growing or grow very slow anyway.
you are going to have to try and give as much information and photos as possible…