How to Pump Air into a Base in Subnautica
Use a fabricator to craft a Base Attach Air Pump, then connect it to your base and a power source.
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To pump air into your base, you need to build a Solar Panel on the surface. Connect it to your base using Power Transmitters.
Power is the secret sauce. Slap on some Solar Panels or a Bioreactor, and your base will be an oxygen supply factory!
Honestly, just built a Habitat Builder and make sure to add power sources. The oxygen will magically follow.
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