Quick answer
Once Human Version 1.5.1 changed Acid automation references: Water Tanks could store Impure Acid and Acid, connect through pipes, and Brewing Barrels used Purified Water + Impure Acid = Acid after the formula adjustment. This is a historical patch reference, not a verified current best Acid farm or hourly-yield guide.
Important version note
This page documents Version 1.5.1 only. Do not use it as a current “best Acid farm” guide without a fresh in-game check.
What this page applies to
Use this page to understand what the 1.5.1 patch changed in the official Acid automation process. Active scenarios, facility behavior, recipes, power requirements, and output can change after later updates, so this page does not prescribe a current territory layout.
Confirmed 1.5.1 process changes
The official notes state that Water Tanks can store Impure Acid and Acid, can connect through pipes, and that Brewing Barrels use the formula Purified Water + Impure Acid = Acid after the formula adjustment.
Water Tank storage and pipes
According to the official notes, Water Tanks can store both Impure Acid and Acid and can connect through pipes. This describes the 1.5.1 process change; verify the live facility tooltip and connection behavior before building a current automation setup.
Brewing Barrel recipe reference
The official formula adjustment listed Purified Water + Impure Acid = Acid for Brewing Barrels. It does not establish a universal output rate or prove that the same setup is optimal in a later patch.
Why no yield claim is published
The official notes do not establish a universal hourly output. Yield depends on the active version, scenario, territory setup, power, facilities, and player testing conditions.
Current-version checklist
- Confirm the active Brewing Barrel recipe in your live game client.
- Verify Water Tank storage and pipe behavior in your current scenario.
- Record territory, power, facility, and test duration before publishing an hourly-yield claim.
- Only compare farm efficiency when the tested patch and scenario are the same.
FAQ
What Acid recipe changed in Once Human Version 1.5.1?
The official Version 1.5.1 notes state that Brewing Barrels use Purified Water plus Impure Acid to produce Acid after the formula adjustment.
Can Water Tanks store Acid after Version 1.5.1?
The official notes state that Water Tanks can store both Impure Acid and Acid and can connect through pipes.
Is this a current best Acid farm guide?
No. This is a historical Version 1.5.1 reference. It does not claim a current hourly yield or a best live-version setup.
Official 1.5.1 update notes: