If you are using an aerotank, your likely using the stock coils. Which as fine. I have a Kanger Aerotank mini here. The thing is with those coils at 1.9 or 2 ohm whichever your using, you won't need more then 8-9 watts usually on it. Those new kanger duel coils you an not clean as easily as many other coils. Best you can do is keep your setup cleaned as often as you can. 2-3 weeks is usually good. I also take some tissue and wrap up an end very small and sit it down into the middle shaft of the coil and let it absorb some of the old juice. It is about the best you can do with those since it is hard to actually take them apart without breaking the head. That said those coils usually last me about 1-2 months. Try vaping on lighter juices as darker juices tend to gunk up coils faster. Another tip if you have issues getting a good draw off it is to take a sewing needle and put it down the barrel and poke a couple holes in the wick. They tend to use too much wick in them sometimes.
That all said and done I just upgraded to an Istick 30w with a Kanger Subtank Mini. I gotta say it hits so much better then my aerotank mini. I still like my mini but man was I missing out on a lot of flavors and it hits great. Not to mention the clouds. I am not much of a cloud person but man are they awesome. I get great flavor and great clouds. I am using 80vp/20pg in my juices now. Though I was using 50/50. Made the switch just because i find i get better flavor with more vg. Though higher vg means thicker juice that is more likely to gunk up coils. Though I think I will be fine. I tend to use mostly lighter juices as it is.
That all said and done I just upgraded to an Istick 30w with a Kanger Subtank Mini. I gotta say it hits so much better then my aerotank mini. I still like my mini but man was I missing out on a lot of flavors and it hits great. Not to mention the clouds. I am not much of a cloud person but man are they awesome. I get great flavor and great clouds. I am using 80vp/20pg in my juices now. Though I was using 50/50. Made the switch just because i find i get better flavor with more vg. Though higher vg means thicker juice that is more likely to gunk up coils. Though I think I will be fine. I tend to use mostly lighter juices as it is.