Ultra High Capacity Tank (Subnautica)

The High Capacity Tank is a piece of Equipment and an upgrade to the regular O₂ Tank. It is crafted by using the Modification Station.

It boosts the player's Oxygen supply by 60 seconds. This is twice as much as a regular tank.

The player can carry multiple tanks at a time. The High Capacity Tank also takes up four slots in the player's Inventory.