What happened that has caused my PPP to go from one of my...

8ft to light, indirect

8โ pot with drainage

Last watered 1 month ago
When treating for spider mites, did you treat the leaves? I had a similar issue where i used a fungicide on one of my plants and it made a ton of the leaves go brown and yellow. What i ended up doing was cutting off all of the dead/dying leaves, leaving alone the ones that still had green but cleaning the fungicide residue off of them (so they stop dying from it) and the plant is doing much better now.
Hopefully in time yours will grow new leaves again :)
Hopefully in time yours will grow new leaves again :)