|This article is about the Standard O₂ Tank. You may be looking for the High Capacity O₂ Tank, Lightweight High Capacity Tank or Ultra High Capacity Tank.|
The player must equip the Standard O2 Tank in the tank slot of the Paperdoll UI in order to benefit from it. While not equipped, it takes up six slots (2x3) in the inventory.
Equipping or carrying any O2 Tank will incur a swimming speed penalty. For more information, see: Swimming Speed.