K ive had a fire eel for about 3 years he seems in good health I have all the params are good never bad and the odd time i see him in his hidding home and hes upside down its really weird hes like this for a couple of hours. I got a dew worm and and gave it to him and he flips around grabs the worm and comes out of his home and hes fine. What do you think how long do they live?