One of my first orchids…had it for ten years and then suddenly it went down. It was labeled sumatrana but its marks were very heiroglyphica…your plant is spectacular and makes me want another.
I have one heritage roth and a phillipinense growing very well since 2018 in south windows — right in the window — and blooming every 2nd year. I use K-Lite. Let’s of oyster shell in the mix.