He has no tank mates, he did but we rehomed the tank mate around a month ago. As for the rest of the information I'm not sure but I've kept these guys for months with no trouble. I've moved his tank temporarily until i clean his main tank out. He's always kept in water at room temperature. He's currently in a much smaller based tank but his usual one is around 50 L and is quite long. I know that probably doesn't help much. He's fed on Salmon pellets, earthworms and oxheart as a treat.