Yeah I have a Horizontech Arctic Turbo tank and it keeps leaking. Right now, it's outfitted with a 0.66 ohm kanthal dual coil system and the other two slots in the coil hat have stoppers installed. But it keeps leaking from the ring between the cap and the top? I noticed there isn't really an O-ring there I could replace nor has there ever been one? The coil is only a few days old and so I know it's not that old. Going "Hercules" and sealing it right seems to have helped a little bit, but I'd like a better solution. Anyone out there got any ideas or anything to say about this?