I also have an enhydris plumbea and found that they are nothing like North American water snakes in terms of husbandry. I've had mine for over a year, and it stays submerged in water 99% of the time, so I keep her like I would with tropical fish, except that I provide a floating piece of cork in case she wants to leave the water. Check out the care sheet for enhydris chinesis at acrochordus.com (http://acrochordus.com/homalopsinae/enhydris/ecaresheet.htm). Plumbea can be kept similar to chinesis. Good luck.