I dont keep Goonch, But from what i've read on most ranges/species they are subtropical. Most people i see keeping them are in tropical tanks.
Subtropical fish die in tropical tanks easy as that. Maybe my failure to keep trout in an aquarium as a child helped me grasp this concept better then others, but people seem to ignore this fact. Most seem to think that if they experience warmer temperatures in the natural rangs at some point during the year it means they are fine year round and this is wrong, most would do better in need these lower temperatures year round and simply tolerate summer temperatures for short periods.
I keep snakeheads like Channa Aurantimaculata from those same areas and it's very similar. For years i've been watching people by them, keep them tropical temps stating "everything's fine" and then say its a mystery when it died a year later. There is no mystery it was kept too warm too long.