Hi all, looking for suggestions for my philodendron white princess (pretty sure). I recently got it, let it adjust and put it on a pebble tray in a bright window with only a couple hours of direct sun. I started noticing small brown spots, that then turned a bigger slimy spot, that is now drying up. I also noticed some mottling, and treated it for spider mites. It seemed to not be drying out very well, so I just repotted with a mix of soil, perlite and orchard bark. Am I in the right track or is there something I’m missing? Not sure that I can get the white back to how it was when it came. Does anyone know what the brown is from? Thanks for any help!