I did clean his tank yesterday before going to get him from my lfs so I'd say the nitrate is low and his tank is fully cycled so ammonia and nitrite are 0ppmWhat is the water quality like?
If the fish was newly imported and you just got him, he could have jet lag and will need a week or so to adjust to the new lighting schedule.
I'll try to make a video, I'll tag you.Without seeing pictures and video of the fish, and going off the information available, I would say he is still getting use to the tank and needs a few more days to recover.