do any of you have betta's that "dance" up and down the tank when you go to their tank? mine gets going so hard he slams into the bottom! Also the old tank I had, used a weird filter and he would swim down to get sucked up then swim out? I got a new tank and put a pump protector on the intake but he still swims around it. He likes to burrow under stuff and it freaks me out because I don't see him in the tank but if I shake his food he runs out like a mad man. Is Ninja just weird or should I be worried?