SUBNAUTICA 2 GUIDEDeep-sea field manual
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Ultra High Capacity Tank (Below Zero)

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The Ultra High Capacity Tank is an equipment upgrade in Subnautica: Below Zero that increases oxygen capacity by 180 units. Crafted at the Modification Station, it provides a total of 225 O2 but imposes movement penalties.

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Ultra High Capacity Tank (Below Zero)

The Ultra High Capacity Tank is a piece of equipment and an upgrade to the High Capacity O₂ Tank. It can be crafted at the Modification Station. It boosts the player's Oxygen supply by 180 units, increasing it to a total of 225 O2.

Overview

AttributeDetails
CategoryEquipment
DescriptionAdditional air capacity.
Blueprint SourceSea Monkey Nests, Arctic Kelp Caves, Lilypads Crevice
Crafting StationModification Station
Build Time3 seconds
Inventory Size9 (3×3)
Oxygen Bonus+180
Debug IDhighcapacitytank

The player must equip the Ultra High Capacity Tank in the tank slot of the Paperdoll UI in order to benefit from it. While not equipped, it takes up nine slots (3×3) in the inventory.

Equipping an Ultra High Capacity Tank incurs a movement penalty of 0.60 m/s underwater and 0.78 m/s on the surface. This is also the only tank that incurs a movement penalty for each one held in inventory: 1.21 m/s underwater and 1.57 m/s on the surface.

Recipe

The blueprint for this item is unlocked by scanning Sea Monkey Nests located in the Lilypads Crevice and Arctic Kelp Caves. It is crafted in the Modification Station.

Modification Station

  • 1x High Capacity O₂ Tank
  • 4x Lithium

Crafting Arrow

Result:

  • 1x Ultra High Capacity Tank

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