Just got a pro tank--I'm pretty new to vaping. The coil said 2.5 ohms, but when I checked it on my vamo it registered 3.2 ohms. Over the course of the day the resistance kept falling, last check it was 1.7 ohms. Is this a bad coil? Replaced it with new coil and it seems to be working ok now. Just curious. Don't know if I'm posting in the right place, new to this message board. Tried to reply on a pro tank thread and it wouldn't let me. Anybody know why? I smoked 3 packs of cigs a day for 40 years, but have not had a cig now for 18 days, really no desire. vaping rules!!! Bob