Some of the main things to think about when selecting a tank are:
1. Vape Juice Capacity - How large the tank is and how many mL of eliquid it can hold.
2. Refilling System - The mechanism and manner by which the tank is refilled. Some are top-fill, others are bottom-fill. Some have more elaborate leak prevention mechanisms.
3. Airflow Control - Some tanks allow you to change the airflow to tailor your session.
4. Coil resistance - lower resistance coils are geared towards large cloud production and higher resistance coils are better for a more intense “throat hit’ sensation.
5. Manufacturing Material - some more complex designs involving reinforcement and/or pyrex glass can make the tank more durable.