dulling of color

[DVirginiana]

Pacs are tropical; their day/night cycle doesn't change as much as ours does seasonally since they are much closer to the equator. If you can't keep the overhead room light on for about 12 hours out of the day then I'd recommend getting a light just for him; no brighter than 40 watts though. It can hurt their eyes. The cycle being off may be part of what's bothering him.
Also, if the window isn't insulated you might want to move him away from it. Being next to the window like that might make him warmer during the day when sun is shining in, but it'll leach heat out of his tank at night.

[Pezsas]

Hey everyone, Just wanted to update everyone. I got the heat correct finally with a gradient through the cage, it ranges from 80- 85 during the day, and 77-82 during night. He has started eating again which is awesome, full grow dubius. and I have even heard him call every once in a while at night. He really is doing great. however the color on his face still has not come back.

[deeishealthy]

Glad to hear you got everything regulated! It's challenging for sure. I wonder if the colour will come back.