For at least the past week, I've noticed that my gourami has been hiding in the back between the back wall of the tank and the part of the filter that hangs down into the tank. He does come out occasionally, and he comes out when I feed him, but other than that he's always hiding in that spot. He wasn't always like this... So what's going on? Is he sick, or maybe he's spooked or something? The weird part, though, is that I've noticed that the mystery snail that I have in there with him has been hanging out mostly on the wall near the filter as well. I don't know what my water's parameters are, because I don't have any more test strips (I had them when I was first getting my tanks started, but ran out and haven't gotten any more) but I do change his water regularly, so I think it's safe to assume that the nitrate/nitrite/ammonia levels are at least acceptable, especially considering he's survived this long and had never shown any signs of discomfort previously. Any ideas?