I have a cactus (and please correct me if that is not the proper term for what it is called) that is around 25 to 30 years old.
It has been turning brown and scaly looking from the bottom up. The areas are hard to the touch (i.e. not mushy).
It has always been indoors and for the last 13 years it has been in the same place in my house in front of an east-facing window. The AC/Heating vent you see has always been closed.
I have read about many things that it could be based on other people's posts and pictures but I would like to get feedback on the pictures I am posting.
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