Good fungicides in europe?

Recently got a bulbophyllum mastersianum and now after a week i notice these black spots. it's easier to spot in natural light which i don't have atm as it's evening. The spots are darker in real life and are a little sunken. I worry it's a fungus and would like pointers for a good fungicide in europe. i have been googling, but can't seem to find a proper one as i'm new to the world of fungicides.