HI all, I'm very new to the plant world.
My wife bought me a bonsai last year which started an obsession that i had never expected. Anyway, long story short my wife bought me an Epiphyllum for our anniversary this year and all was going along fantastically, it had a great shoot growing from the top and when I left work Friday was looking fine. I came in this morning (2 days later) to find it covered in large brown spots and I have no idea what has gone wrong!
I've attached some photos, but basic routine is I water once a week and give it a few days at a time in the sunny window in my office (its a desk plant).
Any help would be greatly appreciated!