On all my PT
tanks, Aero
tanks, etc. I use 30 gauge kanthal ... wrap it 7 times around a 2.4 mm screw driver and I get a 1.7 to 1.9 ohm coil every time.
Good cotton to use is Organic Cotton you can find at most Pharmacies for about $4.00 for enough cotton to wick for a year or more ... or you may want to use, (I do), Japanese Koh Gen Do cotton which wicks
ejuice much better than regular or Organic ball cotton, ( Shown by PBusardo video), and last forever because it's a flat pad, you pull the pad apart making 2 thin pads ... then just cut the strip size needed. Each pad will give you about 40 wicks and there's 60 pads in a box for around $12.00 Koh Gen Do is all over the internet but hard to find in stock but here's one that has it.
Koh Gen Do Cotton | Beauty.com
Here's a you tube video that taught me how to easily wick with Koh Gen Do
https://www.youtube.com/watch?v=iZcY7539wRM
Hope this helps ... keep vaping on