This is my alocasia. The ends are turning crispy brown and theres a large brown spot on one of the leaves. It lost a leaf a month ago, I assumed that was because of a new leaf growing in. I put it on pebbles with water as my room isnt the most humid, and its in part sun. The soil stays damp for a long time though, i haven't changed it since I got it, should I give it some soil with more pebbles and stuff in? Help me please 🙏