What is wrong with Smokey? He's been like this for almost a week now. He hasn't been eating, or swimming, and he just sits on top of this leaf the entire day and either sleeps or sulks. I'm really worried about him. I don't see any sign of disease. He's in a 5 gallon tank, with an adjustable heater always put at 80F. I noticed he doesn't like the filter because the current is too heavy so I tend to leave it off, but he doesn't seem to be acting any happier. He's currently in the Fluval Spec tank. He's below one of his old bubble nests in the image, and I wonder if he's angry at the filter (located to the left of the leaf he is sitting on top), and he's protecting the remainder of his bubble nest or something. But that could just be my imagination...