I have a phal that is turning mushy, soft, and dark at the base. I don't know if it's root or crown rot, but the dark patches seem to be getting larger. I've tried using hydrogen peroxide, but it didn't bubble. I don't know how to save it, but it's one of my favorite plants I own and I want to do anything to try to save it. If anyone knows what the issue is or how to fix it, I'd really appreciate the help.