Where is the High Capacity Tank in Subnautica?
The blueprint for the High Capacity Tank is often in wrecks in the Grassy Plateaus. Check data boxes in those locations!
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Just craft an ordinary O2 tank, then use it at the Fabricator to unlock the High Capacity Tank. Easy peasy!
I found mine in the Grassy Plateaus. Explore near the red grass areas and you should find a data box with the blueprint.
You can find the High Capacity Tank blueprint in the Grassy Plateaus or in the Degasi Seabases in the Jellyshroom Cave. Happy diving!
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