The water shifted from cooling blue to blistering steam as I rounded the ridge. You feel every bubble like hot pinpricks, and that little tingle tells you your suit won’t last long. I had to get Heat Tolerance before the ocean cooked me out of the mission.
The Old Habitat smells of rust and burnt wiring: How to get Heat Tolerance in Subnautica 2
I’ll walk you through what I did, step by step, so you don’t learn the hard way. You need one adaptation bulb from an Angel Comb — not by luck, but by clearing a Bloom infestation with a Sonic Resonator. Get that, and hot biomes stop being a brick wall and start being a resource farm.
How do I get Heat Tolerance in Subnautica 2?
Short answer: craft a Sonic Resonator, blast three Angel Combs clean of Bloom Cankers, and take the adaptation bulb from the adult. The longer answer is practical: scan two Sonic Resonators to unlock the blueprint, build the device, and visit three precise POIs so the adult comb will flower for you.
How to make a Sonic Resonator?
I found that scanning two broken Sonic Resonators is the fastest route to its blueprint — one at the Old Habitat (~300 m north of the Lifepod) and another in a metal crate near the Spider Dome (~240 m southwest). Once the blueprint is complete, you’ll need:
- Basic Battery ×1
- Titanium Ingot ×2
- Lead ×2
- Wiring Kit ×1
Basic Batteries: cheap and local. Two copper + one Acidic Raion Pouch. You’ll find copper and pouches in caves around the Lifepod during your first hours.
Titanium Ingots: you need a Processor. Scan broken processors at Old Habitat to get the machine blueprint, then feed three titanium to make each ingot — it takes about a minute per batch. Lead and silver spawn farther out: ravines and cave overhangs near Old Habitat and Camp One are rich with nodes. Wiring Kits are copper wire + silver.
Broken floodlights still glow at midnight: Angel Comb Bloom Infestation puzzle solution in Subnautica 2
Finding the combs is simple if you know where to swim. You’ll visit three locations to clear the infection and make the adult bloom for its adaptation bulb.
- Adult Angel Comb: Angel Comb POI, ~200 m northwest of the Lifepod
- Juvenile 1: Spider Dome POI, ~240 m southwest of the Lifepod (also houses a Sonic Resonator crate)
- Juvenile 2: ~140 m northeast of the Adult Angel Comb (about 240 m north-northwest of the Lifepod)
Expect trouble at the adult: an aggressive Marrowbreach and Nibbler Mango will harass you while you work. The thing to spot are Bloom Cankers — small, blue growths on the Angel Comb tentacles. The Sonic Resonator is a scalpel for the bloom: one clean blast and a canker disintegrates.
Clear every Bloom Canker on the adult and both juveniles. When the adult flowers, reach into the bloom and claim the Heat Tolerance Adaptation bulb — that’s it. Once you’ve got it, hot water no longer chips away at your health, and you can probe volcanic trenches for rare ores and story progression without constantly racing the thermometer.
Where are the Angel Combs for Heat Tolerance?
Old Habitat and Spider Dome are your landmarks. Use the Lifepod as a compass: north for Old Habitat (300 m), northwest for the adult (200 m), and southwest for the Spider Dome (240 m). Community hubs like the Subnautica subreddit and the Subnautica Wiki (and even Steam guides) have maps and screenshots if you want visual markers — Unknown Worlds Entertainment’s directories also list POI names.
If you prefer real-time tips, the Subnautica community on Discord and the Steam Guides section are where players share exact spawn points and crate locations. I used a Reddit thread that called out a metal crate near Spider Dome with a Sonic Resonator inside — saved me an extra swim.
Go through the steps logically: scan, craft, clear, claim. Want to risk a few scorches for the faster route, or play it safe and methodical — which will you choose?