Freshwater
Please, do yourself a favor and take that FX5 and sell it! Great for freshwater but can cause some major problems a little later for salt. It sounds like the guy is just a little stressed out, possibly from the tank move, give him a few weeks (if he puffs up he's ready to eat otherwise DONT feed him). Could be the lights, could be the system but if he doesn't get better its either an indicator of something wrong with the system or something wrong with him.
Either way, good luck!
Levi
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