Increasing Max Oxygen - Standard Air Tank
There are four status bars you’ll have to keep in mind in Subnautica 2 - health, food, water and oxygen. As long as you’re not being attacked, in a hazardous environment, or dangerous low on the other three, health isn’t much of an issue, and finding various sources of air or surfacing will take care of your oxygen. Finding digestible food is a concern, but your food will last you longer than your water will, so this page will focus on how to obtain drinkable water in Subnautica 2!
Page Breakdown¶
Water Sources¶
Your hydration level (the darker, smaller blue icon in the bottom left of the screen) will constantly deplete while you’re in-game, and despite being in a game where you’ll be spending most of your time underwater, getting drinkable nature-juice isn’t as straight-forward as it might seem. Turns out highly salinated water is dangerous! Not to mention the dissolved heavy metals and whatnot… point is, dipping your head out of your Lifepod and taking a sip isn’t an option for a good reason, and that reason is death. That being the case, you’ll have to be a touch more intrepid to sustain yourself.
The best way to get water in the early game is to catch Water Slugs,
and turn them into water at a Fabricator.
Water Slugs¶
The most abundant source of water - at least in the biome you start the game in - comes from native fauna, namely Water Slugs. These amorphous spikey globs can be found crawling along the ocean floor, a fitting spot for a critter that’s literally at the bottom of the food chain. They glow at night, making them somewhat easier to see, but they’re not fast nor are they capable of defending themselves, so just swim up and grab them. Like most things native to this planet, it requires processing before it can provide any sustenance to you.
In order to do this, go over to your Fabricator in your Lifepod (presumably you’ve figured this part out already if you’ve made it far enough to build a base, scroll down to the “Sustentance” icon and you should find the option to convert one held Water Slug into one bottle of Water. Each bottle of Water (and hence each Water Slug) will provide you with 40 units of water.
Later on you can use a Processor to extract potable water from Fibrous Pulp.
Processor: Fibrous Pulp¶
In the starting biome, you’ll find plenty of Water Slugs - they’re crawling around just below the Lifepod, in fact, and if you’re even remotely curious you’ll pick one up and find out what to do with them before long. Eventually, however, you may find that in new locations or biomes are less generous with living sacks of water waiting for you to vampirize them.
Fortunately there’s another way to get water, but it takes a bit more effort. Once you build a Processor (check out the base building link for more information - you need to build a base to store a Processor in and provide it ample power to function) you’ll be able to convert Fibrous Pulp into Water. Fibrous Pulp comes from a variety of plantlife - each region is bound to have some sort of flora you can harvest with your Survival Multitool. The starting biome, for example, has Macaron Sponges, which you can vandalize to obtain Fibrous Pulp. Three units of Fibrous Pulp can be processed via a Processor into one bottle of Water. It takes more time and effort to create water this way, but it’s still a better alternative than dying of dehydration every few minutes!
Other Sources of Water¶
It should also be noted that other consumables can also alleviate your thirst, like a Cooked Bluemoon. Foods tend to yield relatively little towards your water intake needs, however, so such sources of water should be viewed as strictly supplemental. Especially considering how much more frequently you need to hydrate than to eat.



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