Ficus Fig Houseplant Dying
I have a really large Ficus Fig houseplant that is dying. Don't what to do. It's leaves are turning black/drk brown - some start in the middle of the leaf, some are around the leaf. I haven't been able to see any insect with a magnifying glass. At the rate that it is dropping huge leaves, the tree will be dead within a month.
What can be done to save this huge indoor plant?