The issue with the T series coils is the vast amounts of cotton... they need to be seriously primed... marinated, even...
YES - New coils Must Be Prime and let set for a few minutes before vaping . . .

AND - to be honest, although I mainly use "My" BB's usually - both the Innokin T18 & T22 have been "My" go to when out and about town . . . Just Sayin' . . .
I have been interested in the t18/22 tanks due to the coils but the fact I can't buy one without a mod has put me off. I know the combo is cheap but I just don't need another mod so why can't I save $20 and just buy a tank for $12 or whatever.
FYI: Simple "Google" search found the Innokin T18 & T22 Tanks available . . .
Innokin T18 Prism Tank
Innokin T22 Prism Tank
Both under $10.00 and they were having a Memorial 20% off everything sale too that you might be able to still get: REMEMBER
Don't forget to get extra coils for the tanks while you are there - 5 packs cost almost as much as tank . . .
They are also - at Vaping Cheap (which I cannot access) . . . And - Although a little more expensive they are available at:
$10.88 Authentic Innokin Prism T22 Tank Clearomizer - 4.5ml / 1.5ohm / stainless steel + glass at FastTech - Worldwide Free Shipping
Heaven Gifts
2017 Dragon Boat Festival Sales - 30% OFF with Code UKEXPO30
https://www.heavengifts.com/product/Innokin-Prism-T18-Tank.html
https://www.heavengifts.com/product/Innokin-Prism-T22-Tank.html
Soucemore
Innokin Endura Prism T18 Tank 2.5ml Top Filling with 1.5ohm Replaceable Coil Head