Plasteel Tank
The Plasteel Tank is the highest-capacity standard oxygen tank in Subnautica 2, crafted from Titanium, Glass, and Silicone Rubber. It is essential for deep dives and serves as the breathing equipment for the Cyclops on long expeditions.
Quick Info
Description
The Plasteel Tank is built around a Titanium core wrapped in a transparent Glass bladder and sealed with Silicone Rubber. The result is a sturdy, high-capacity oxygen tank that adds roughly 75 seconds of breathing time over the standard tank. Cyclops pilots install Plasteel Tanks as breathing equipment for the bridge and engine room.
How to Craft
The Plasteel Tank is crafted at the Fabricator from Titanium, Glass, and Silicone Rubber. Glass requires Quartz first, so plan to gather quartz, copper, and titanium before crafting.
Titanium
2x — mined from limestone outcrops or salvaged metal.
Glass
1x — crafted from 2x Quartz at the Fabricator.
Silicone Rubber
1x — crafted from Quartz at the Fabricator.
Uses & Recipes
The Plasteel Tank is primarily an end-user equipment piece, but it also slots into the Cyclops as breathing equipment. Plan at least two tanks per deep dive to give yourself a safety buffer.
Cyclops Breathing Equipment
Installs inside the Cyclops to keep pilots breathing on long expeditions.
High-Capacity O2 Module
In-suite upgrade for habitats that need extended crew endurance.
Deep Dive Suit
Combines the Plasteel Tank with reinforced suit modules.
Crafting Calculator
Plan your total Plasteel Tank needs across all recipes.
Tips & Strategies
Farm Titanium Early
Each Plasteel Tank consumes 2x Titanium. Mine a stockpile of 30+ Titanium Ingots before you commit to building multiple tanks so you don't run dry halfway through.
Process Quartz in Batches
Glass and Silicone Rubber both require Quartz. Process a stack of Quartz into both at once to keep your pipeline from bottlenecking on a missing Glass.
Equip the Cyclops First
Install one Plasteel Tank in the Cyclops before carrying tanks on foot. The Cyclops tank lets you resurface safely even if your handheld oxygen is empty.
Combine With Rebreather
Pair the Plasteel Tank with a Rebreather for the longest possible dive windows. Together they unlock dives past 1000m without surfacing.
Related Items
Map Locations
To craft Plasteel Tanks, mine Titanium from limestone and salvage metal, then collect Quartz for Glass and Silicone Rubber. Pin both on the interactive map for efficient combined runs.
View on Interactive Map →Related Guides
Oxygen Management
Tanks, Rebreathers, and surfaces strategy for long dives.
Cyclops Fabrication Guide
Install breathing equipment and depth modules step by step.
Titanium Farming
Routes for limestone mining and metal salvage loops.
Deep Diving Strategy
Combine Plasteel Tank, Rebreather, and Prawn Suit for 1000m+ dives.
Frequently Asked Questions
What is a Plasteel Tank made from?
A Plasteel Tank is crafted from 2x Titanium, 1x Glass, and 1x Silicone Rubber at a Fabricator. Glass and Silicone Rubber both require Quartz, so the chain starts with mining Titanium and Quartz.
What is a Plasteel Tank used for?
The Plasteel Tank is used as a high-capacity oxygen tank for deep dives and as breathing equipment inside the Cyclops. It is the largest standard O2 tank available.
How much oxygen does a Plasteel Tank hold?
The Plasteel Tank adds roughly 75 seconds of breathing time over the standard tank, making it the highest-capacity O2 tank in the standard lineup. Pair it with a Rebreather for even longer dives.
Report an Error
Spotted wrong info, outdated data, or a typo? Help us keep this page accurate for the community.
Report this page