I have a beautiful kangaroo fern that is in distress and would appreciate any advice that people may have. The older growth develops almost translucent looking/bleached spots. Some of the leaves also have black spots and browning. There is new growth and it looks healthy to me. It's on a shelf about 6 feet away from a large window. It does get bright morning light, never direct light. Not sure if it's not getting enough light? I try to make sure it stays moist, but I also get afraid of overwatering. I live in Southern California and the air is dry, but I do use a humidifier in the room and try to keep it around 60% humidity. I think for about a week however I was running the humidifier too much and the humidity level was much higher. I have only had the plant for about a month and have not fertilized it since bringing it home. New growth seems to have slowed, but there are still new leaves sprouting. Any ideas on what may be going on? Thanks in advance for your help ♥️