Bad news for me.

Thats unfortunate news lad. My condolences.
Those water quality results are not the best, but usually cichlids can hold up better than other freshwater species. (purely in my experience and not with aspito tho)
Is there a possibility that there were other factors involved? Such as stress from other fish which may also have contributed to ill-health? My severum's were not happy with a red tail shark in the tank. They would hide due to his high activity and chasing, they were displaying clear signs of distress, they stopped breeding, loss of colour, wouldnt eat.
Now, don't get me wrong, i am not saying that it wasn't solely the water quality, and i do know with wild caught fish you have to give them special treatment but just saying that there could also have been a few other factors which may have also contributed.
Taking into consideration i have no idea of you're tanks stock. Checked you're profile and could only find "semi Aggressive Cichlid tank"
Anyhow homie. Just giving u some idea's
but all in all Not good news, Hope you cheer up cuz they are a beautiful fish
Peace

Never called it bad, said it aint the best. If its a wild caught fish then it would be deemed as a "sensitive" species. You're taking a specimen out of its natural habitat, where water quality mostly isnt an issue, but fact is fact. Sensitive species do require more attention to water quality. Which would why ktrom is attributing his fishes passing to it.
Discus is another example of a sensitive species.
My impression was that the optimum range of ppm for nitrate for sensitive species was between 5-20ppm
5 -40ppm is optimal for captive bred fish. anything above 60 the fish will last a few days but then cya mate. 20ppm being on the higher end of a sensitive fishes water parameters.
Now, for me, when it comes to sensitive fish such as discus, in the past i have tried quite hard to keep it below 20pmm, whether i was successful or not, if i was at the higher end of the scale. I would know that there would be a chance that water quality might be a factor in the fishes health.
There is literature out there stating optimal nitrate levels for all freshwater tanks is 5-10.
But my point of my comment was that even though this could be a massive factor especially for a wild caught fish, there might be other issues.

rest in peace lil' fishy.

Hmm, T.Espei. Couldn't really see them doing any harm.
Only way i would attribute them to have an influence is if they swarmed his territory repeatedly.
That would annoy me if i was a fish.
so dunno bruz, if he was stressed he probably would have not been eating.
Keep at it,
Will you be getting a replacement?