Hey Mike, I appreciate your not telling me to hike somewhere else and engage in something entirely different and refreshing
I too am a bit sorry about how it came out... sighs... I could have been a lot more graceful and said it simpler. Just ain't got it. Your are not guilty that I became sensitized to the subject.
We get a lot of questions from new members and it is 99.9% of the time a tooth-pulling and time-consuming exercise to even start establishing a mere baseline on what might be wrong, if anything, in their tanks and get them to tell their water parameters because (as it eventually turns out) by far and large most usually they never test their water or never use the liquid tests... and often don't want to admit it either. Or even admit their water contains ammonia or nitrite or some other parameter is wrong.
It is also the best practice to have the test kit at home and not run to LFS any time one needs a measurement.
Anyhow, I am looking forward to more info. Meanwhile, I assume you don't exactly know what transpires at nights, or do you? You must be speaking for the day time that the fish doesn't move much.
Is there any damage on it? Fins? Scuff marks?
If the fish started out the fast looking healthy and fed, I'd not worry about a 2 week fast. But something's off and we need to figure out what. The only way for us to remotely attempt make sense of it is to be armed with all the info you can give us.