Before using the Triton II tank, the coil must be installed. If the coil is not installed before the tank is filled, the entire liquid contents will leak out of the air vent.
Please take the time to review the above image and become familiar with the tank's several components.
For the Triton II, the tank is bottom fill. This means that you need to grab the tank from the lowest point when putting it on, and taking it off the battery. If you grab the tank anywhere above the base when applying it to the battery, you not only will tighten the tank to the battery, but you run the risk of over-tightening either the battery to the tank base or the tank base to the tank chamber, making it very hard to separate without tools.
Triton II II tanks perform best when regularly filled with at least 1ml of e-liquid. This ensures the heating element remains moist during use, and will extend the overall life of the coil head. It's highly recommended that tanks be refilled once the e-liquid level drops below the top of the coil head.