Unsure what is on my driftwood and now on some of my vallisneria
I have this sort of white stuff that has started to spread on my vallisneria and on my driftwood. I have not seen this before in my years in the hobby and i can't find answers anywhere so hopefully someone can help identify it. It spreads on the vals and eventually the leaves seem to die. I am dosing an all in one fert and all my water chemistry is completely fine.
I have attached some photos