Hi there! I'm having an issue with my Philodendron Selloum. About a month ago, I trimmed its excessively long aerial roots because they were spreading everywhere. I read on the internet that it's okay to do so and that it shouldn't harm the plant. However, since then, my plant has been getting worse, and I don't know what to do. I tried using a 7-4-7 NPK fertilizer, but it doesn't seem to have helped at all. I was watering it enough, once a week as usual. Do you have any suggestions on how I can help it, and is there anything I can do? I also noticed some cracks on its trunks.