Hey, just a general observation for you Zenfidels out there wondering why your
juice is getting dark at the bottom of the tanks. I did some experimenting to find out why this is happening. Now at the verge of a nic OD I think I have the answer to why this happens with the Zenesis
It's actually nothing really bad or detrimental so nothing to worry about. The seemingly random darkening of the
juice at the bottom of the tank is really not that random at all. This seems to occur more with 5 coils than with 4 coils but is completely normal. What is happening is that since Zen designed the Zenesis to run one battery per tank of liquid, and also designed a flowback hole so that you don't have to wipe the inside of the cap clear of condensation constantly the coils run just a little bit cooler at the end of the tank. This causes a darker color condensation because a minutely smaller amount of the
juice is vaporized and therefore slightly more becomes carbonized and when the darker condensation runs back into the tank it turns the remaining juice darker.
If it really bothers you you can change the battery and refill when you've gone through about 3/4 of the tank minimizing the chance of developing the darkened juice condensate or you can just vape till it's empty and fill'er up with new juice and a fresh battery and charge it up again. After you've gone through a handful or so tanks of juice you should pull the tank and rinse it out anyway just to keep everything fresh and clean in your Zenesis so simply not paying attention to the darker juice and doing some minor maintenance from time to time is always a good idea, kinda like changing the oil in your car regularly.