This is a Cymbidium that I took from a friend. It was over watered and most of it rotted off. I managed to save a small portion but it's not doing well. It would produce a new plant and soon after it would start turning brown. At first I thought that I was over watering it because the new growth would die off. I watered it less frequently and changed the medium to hydrotons. It produced another plant but the same results would happen. It would start growing and it would eventually turn brown. Now I'm guessing that there might be some disease. I recently checked on the roots and they are super white. They do seem healthy. Very firm and not mushy. Any ideas?