WillC said:Your Calathea overall looks pretty healthy. It is quite normal for some of the older leaves to die back as new leaves are added. The lighter overall color might be caused by exposure to any direct sunlight or using hard water that contains excess mineral salts such as calcium. If your tap water is on the hard side, use distilled or filtered water instead.
Your Calathea is not in danger of dying. I hope you will now worry about it less and enjoy it more!![]()