pc lights are on in the day and moon lights on at night.
No problem with that. Probably sounded like a stupid question but with my job I've learned to ask them.

As long as he keeps eating well and doesn't show any other signs of problems I wouldn't worry about it. It's real easy to get into trouble trying to "fix" a fish when you don't know exactly what your trying to fix or if there is even a problem.

I have a puffer at the store that spends it's time playing with a gorilla crab I threw in the tank and the rest of the time taking a nap in the corner of the tank. People always think it's dead when it does that. Why it won't just eat the crab I don't know. Just likes tormenting the thing I guess.