I have a 30" albino marble lung. Not sure you can kill them by running it over with your car.Well personally I haven't looked into the Chinese wels specifically. So I wasn't saying it isn't hardy, but I was merely saying there's fish that can likely withstand the neglect (hardier), so rather than possibly killing fish maybe you can try something like a lungfish or bichir or something that you like that can take missing a few weeks of wc or feedings.