Hey plant parents, I’m not sure if I’m just overstressing but I’ve had a phal orchid for around three years, the most recents two where it’s been in water culture. Root rot and I had history when it was in bark. However, today, I noticed that the third leaf up was beginning to yellow, but all of the roots are healthy and the leaves aren’t soft or mushy. Is there anything to worry about? It’s growing it’s eighth leaf right now, and the bottom four leaves are at least two to three years old (been there since I got it), but that it’s not the bottommost leaf dying off has me a little stressed