I currently have him in a tub that I'm thinking is too big even though I've added extra hides and clutter for him to make him feel more secure. He's active and moving around but I'm wondering if he would be better in something like a 10g or 20 long instead of the 41qt tub he's in currently. He's 71g and about 1.5 feet but I haven't been able to get a true measurement since he won't stretch out fully for me.