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Build a Metal Farm and keep Troilite renewable

Unlock the three scans, connect power and preserve the mineral needed to start production.

Early Access 1.2 · Buddy System Hotfix 1, September 3 amendment · Updated 2026-09-12

The short answer

Scan all three parts of a ruined Metal Farm, build one with a Mangalloy Ingot and an Axum Bacterial Culture, connect power, then insert the mineral you want it to grow. Reserve one raw Troilite before processing the rest.

Before you start

  • Tadpole prepared for the deep Metal Farms region, Scanner, Repair Tool and spare power.
  • Habitat Builder and Sonic Resonator. Check your vehicle’s displayed depth limit.

Unlock the blueprint in the Metal Farms region

Search the ruined farm beside the yellow-green pool. Scan the main body and both prongs for the three required scans. Predators can damage the Tadpole; keep it nearby and leave room to retreat.

Sources for this section

Craft the farm without spending your last seed mineral

ComponentFor one farm
Mangalloy Ingot1 Titanium Ingot + 1 Atacamite + 1 Troilite at the Processor
Axum Bacterial Culture1, gathered in the Metal Farms region
Reserve outside the recipeAt least 1 additional raw Troilite if you intend to grow Troilite
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Connect, seed and harvest

  1. Place the farm with the Habitat Builder near a working power supply.
  2. Position the transmitter so its connection line reaches the farm. Its listed power requirement is 20.
  3. Insert the mineral to reproduce. The input mineral determines output.
  4. Wait for the displayed timer, then harvest the grown node using its current tool prompt. The general Sonic instruction does not establish the current Atacamite interaction.
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Find the missing part of the loop

ProblemNext check
Built but inactiveCheck available power and the transmitter connection.
No production timerCheck that an accepted mineral is in the input.
A grown node remains on the farmHarvest with the tool shown by the current node prompt; Atacamite needs a separate current-build check.
No raw Troilite left to seedSearch the resource route; a completed Mangalloy Ingot is not raw Troilite. Do not assume an unverified respawn timer.
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Separate construction costs from production stock

Kingy planning example: one farm consumes one Troilite in its Mangalloy Ingot. Keeping another as seed means you need two raw Troilite before that first build. The turbine calculator intentionally excludes farms, power equipment and retained seed minerals; add them to your trip budget separately.

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Your checklist

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Research checked 2026-09-12. This is a source-based guide; Kingy has not independently play-tested these steps. Evidence and coverage.

Independent fan guide. Subnautica 2 belongs to Unknown Worlds and KRAFTON. Kingy illustration; not game footage or a navigable map.