From your question I guessed you wanted to know how to fill a carto to be used in a tank. I utilize a several methods to fill the carto. I start with the condom method which can be found on here. I then spin it a little, I think called the Tarin spin. I then fill with some drops from the top of the carto. Install it in the tank and do a few primer puffs without firing and then let sit a few minutes. Smoktech seem ready to go quicker and the Boge seem packed a little tighter to me and require a little more sitting to soak into the fiber to wet the coil.