Standard O₂ Tank (Subnautica)

The Standard O2 Tank is a crafted piece of Equipment which boosts the player's Oxygen supply by 30 units. It is crafted at the Fabricator.

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 6 slots (2x3) in the inventory.

It can be upgraded into the High Capacity O₂ Tank at the Fabricator, which can be further upgraded into the Lightweight High Capacity Tank and the Ultra High Capacity Tank at the Modification Station.

Equipping or carrying any O2 Tank will incur a swimming speed penalty. For more information, see: Swimming Speed.