High Capacity O₂ Tank

This article is about High Capacity O₂ Tank in Subnautica. For the related article on the Below Zero Wiki, see High_Capacity_O₂_Tank.

This article is about the High Capacity O₂ Tank. If this is not what you are looking for, see Oxygen Tank (Disambiguation).

The High Capacity O₂ Tank is an upgrade to the Standard O₂ Tank that is crafted at the Fabricator, being the only upgrade not requiring a Modification Station. It can only be crafted after the player has acquired a Standard O₂ Tank. While equipped, it boosts the player's maximum Oxygen supply by 90 units for a total of 135 units.

The player must equip the High Capacity O₂ Tank in the tank slot of the Paperdoll UI in order to benefit from it. While not equipped, it takes six slots (2×3) in the inventory.

It can be upgraded to the Lightweight High Capacity Tank or the Ultra High Capacity Tank at the Modification Station. Neither can be upgraded into the other.

Note that when an O₂ tank of any kind is built, it defaults to being empty: it must be equipped in an atmosphere in order to fill it. This is important if the player intends to carry multiple tanks for deep diving without a vehicle.

Recipe

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Upgrades

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Gallery

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Items in Subnautica

Raw Materials

Acid Mushroom • Alien Feces • Baby Leviathan Enzymes • Blood Oil • Cave Sulfur • Copper Ore • Creepvine Sample • Creepvine Seed Cluster • Crystalline Sulfur • Coral Tube Sample • Deep Shroom • Diamond • Fungal Sample • Gas Pod • Gel Sack • Gold • Kyanite • Lithium • Metal Salvage • Magnetite • Nickel Ore• Quartz • Salt Deposit • Silver Ore • Speckled Rattler • Stalker Teeth • Ruby • Table Coral Sample • Titanium • Uraninite Crystal

Seeds and Spores

Blood Oil • Bulbo Tree Sample • Chinese Potato • Creepvine Sample • Creepvine Seed Cluster • Bulb Bush Sample • Lantern Fruit
Acid Mushroom Spore • Blue Palm Seed • Cave Bush Seed • Deep Shroom Spore • Eye Stalk Seed • Fern Palm Seed • Furled Papyrus Seed • Gabe's Feather Seed • Gel Sack Spores • Ghost Weed Seed • Grub Basket Seed • Jaffa Cup Seed • Jellyshroom Spore • Marblemelon Seeds • Membrain Tree Seed • Ming Plant Seed • Pink Cap Spore • Pygmy Fan Seed • Redwort Seed • Regress Shell Seed • Rouge Cradle Seed • Sea Crown Seed • Speckled Rattler Spore • Spiked Horn Grass Seed • Spotted Dockleaf Seed • Tiger Plant Seed

Crafted Resources

Basic Materials	Bleach • Enameled Glass • Fiber Mesh • Glass • Lead • Lubricant • Plasteel Ingot • Silicone Rubber • Titanium • Titanium Ingot

Advanced Materials	Aerogel • Benzene • Hydrochloric Acid • Polyaniline • Synthetic Fibers • Hatching Enzymes

Electronics	Advanced Wiring Kit • Battery • Ion Battery • Computer Chip • Copper Wire • Power Cell • Ion Power Cell • Reactor Rod • Wiring Kit

Food & Water

Drinkable	Coffee Americano • Disinfected Water • Filtered Water • Large Filtered Water • Reclaimed Water

Fish	Bladderfish • Boomerang • Eyeye • Garryfish • Holefish • Hoverfish • Oculus • Peeper • Reginald • Spadefish • Spinefish

Raw	Chinese Potato • Creepvine Sample • Bulb Bush Sample • Lantern Fruit • Marblemelon • Gel Sack

Processed	Nutrient Block • Snacks

Personal

Equipment	Compass • Fins • Fire Extinguisher • First Aid Kit • Pipe • Radiation Suit • Rebreather • Reinforced Dive Suit • Scanner Room HUD Chip • Standard O₂ Tank • High Capacity O₂ Tank • Stillsuit

Tools	Air Bladder • Flare • Flashlight • Habitat Builder • Laser Cutter • Light Stick • Pathfinder Tool • Propulsion Cannon • Repair Tool • Repulsion Cannon • Scanner • Seaglide • Stasis Rifle • Survival Knife • Time Capsule • Thermoblade

Deployables

Beacon • Creature Decoy • Grav Trap • Mobile Vehicle Bay • Seaglide • Waterproof Locker

Upgrade Modules

Cyclops	Creature Decoy • Cyclops Decoy Tube Upgrade • Cyclops Depth Module MK1 • Cyclops Depth Module MK2 • Cyclops Depth Module MK3 • Cyclops Docking Bay Repair Module • Cyclops Engine Efficiency Module • Cyclops Shield Generator • Cyclops Sonar Upgrade • Cyclops Fire Suppression System • Cyclops Thermal Reactor Module

Prawn Suit	Engine Efficiency Module • Prawn Suit Propulsion Cannon • Prawn Suit Torpedo Arm • Prawn Suit Grappling Arm • Prawn Suit Drill Arm • Prawn Suit Jump Jet Upgrade • Prawn Suit Thermal Reactor • Hull Reinforcement • Prawn Suit Depth Module MK1 • Prawn Suit Depth Module MK2 • Storage Module • Gas Torpedo • Vortex Torpedo

Seamoth	Engine Efficiency Module • Hull Reinforcement • Seamoth Depth Module MK1 • Seamoth Depth Module MK2 • Seamoth Depth Module MK3 • Storage Module • Seamoth Solar Charger • Seamoth Perimeter Defense System • Torpedo System • Seamoth Sonar • Gas Torpedo • Vortex Torpedo

Scanner Room	Scanner Room Range Upgrade • Scanner Room Speed Upgrade • Scanner Room HUD Chip

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Recipe

Upgrades

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