Flashlights light going out!!!
Flashlights light going out!!!
I see there are people with flashlight fish experience on this thread, and I need the help of those who are familiar with them first-hand! My flashlight fish's lights have gone out!!!! They reflect light very well, which surprises me, but there is zero light when all the other light sources in the room are out

I've read that it can happen, but not why, and what to do. He still seems as happy and healthy as before, just dark. He used to constantly flash all the time, but now he just leaves it open, I guess cause he's wanting light. He's still in my QT tank, where he's been for 2-3 months now, and while I haven't added any meds at all, the tank regularly has copper all the time, during the QT of regular fish, so there's definitely some very low levels in the water, from the rocks and sand and silicone, and such, but I was never aware of copper specifically being anti-bacterial. He eats like a champ, and has since day 2, but all he eats is PE mysis, and I know even alone, that's not a terrible diet, there may be nutrients and such that the bacteria need, that they're not getting from just that. I've read with pinecone fish that extinguished lights can be "œreignited", but I don't remember how, and now can't find the source I read about it from, before. Can anyone help me? More-so, can anyone help my little guy shine again???