How do I make Aerogel in Subnautica?
You need two ingredients: Gel Sacks and Rubies. Just gather those, then craft it in the Fabricator!
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Take a dive, find some Gel Sacks on the ocean floor and Rubies in caves or deep areas, then fabricate aerogel. Easy peasy!
Get Gel Sacks and Rubies, then use the Fabricator. Voila, aerogel!
Trust me, as someone who's made it dozens of times: Gel Sack + Ruby = Aerogel. Simple as that.
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