I think my Phal has root rot? The lower leaves have fallen off and there is a visible blackness creeping up the stem system. I repotted it a couple of months ago. It had been cared for by someone who watered it every Friday and did not drain it but left it inside an outer, almost exact same size as inner “orchid” pot. In other words constant standing water. When repotting I removed the dead roots. This left 1 lower root about .5 inches in length and one reaching above ground. Poor thing had been struggling and my attempts to help it appear to have done the opposite. Ideas on what to do going forward? It’s already lost the two biggest leaves at the base. Thank you!