Standard O₂ Tank (Subnautica)

The Standard O2 Tank is a crafted piece of Equipment which boosts the Player's Oxygen supply by 30 units. The player has an equipment slot just for the Standard O2 Tank, freeing up space in their Inventory. Only the tank stored in the slot will give the player oxygen.

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.