Please look at the photo attached. I have him in a happy 5 gallon tank, all levels are fine per 5-in-1 easy strips and tank is at a nice 80F with a filter of course. I've had fish for almost 2 years. For the past 2 weeks he has been sitting at the bottom of the tank, or hiding, and not coming up for food. I had stopped feeding him for a few days to see if he was constipated...no change. He won't come up for food. Though he is grayer in color and clearly a bit stressed or unwell, I don't see any other physical signs of illness...do you? Ick? Parasite? Depression? I give up. Thanks for your help.