All I know about them is the scientific data online about them and the stories I have read. I have been told they can either be really mellow or completely psychotic. Guy at one LFS said he hand feeds and pets the 4'+ one he has, but I'm not sure I believe him.... I've never seen it with my own eyes. Also I believe in the thread titled "show me your eels" there is pictures of a guy petting and swimming in the tank with his?! With a size of 8'+/- I can not imagine how much the feeding would cost. A massive tank would be needed to properly house one. Your 10' pool idea may work but to keep the monster from escaping is gonna be a task and a half.