Didn't get much response from other post so I am trying again. Last weekend the heater in his tank malfunctioned and the temp went to 92. I did an immediate 50% water change and got it back down around 75 - 78. He's in a 2 1/2 gallon tank no filtration, with a light. He hasn't eaten and is totally lethargic. He will swim up to me when I move something around in his tank and then just kind of sinks back down and stays there. He's been hiding in his tunnel or laying up against the glass. What can I do to help my little guy? Seems like he might have swim bladder disorder but yet he can stay bouyant for a short period of time. This is one tough little guy too! He jumped out twice and lived, before I got a screen. Is there something I can add to his tank in hopes of making him feel better? Wish he would eat!