I have not been overwatering my staghorn fern, I water them at the base about 60cc every week.
I don't most my plants very often and they have been stable for a year until this happened. The only thing is that my place is warmer this summer because the AC is temporarily broken.
I have made sure to let dry before watering but the problem is just getting worse. I suspect it might be a fungus, how can I bring these plants back to health?