I’m on HWS RE EU and I’ve been looking up and down for “Hydrophonics Unit” in the in game tech tree, but either my eyes have a filter or they removed it from the tech tree.
In the constructor, under blocks, the 3 versions of it are blue with a pad lock and the note at the bottom “Unlock in Tech Tree”. I’ve looked but cant find it in Tech Tree (yes i looked in all sections).
I can research the “Hydrophonics Bay”, but obvuiously i can’ neither build not place it since it requires “Hydrophonics Units” as input and under it when placing.
I can build and place the “Plant Grow Light” and i had some “Hydrophonic Units” im my OCD that i can place without issues.
As a test i started a creative game and researched everything in the Tech Tree (a lot of clicking). When i opened a contructor, the “Hydrophonics Unit” was still blue with a padlock …
After restarting they appeared, without a padlock, so all is well.
I still cannot find them in the Tech Tree, so i assume they we’re unlocked together with the "Hydrophonics Lamp or the “Hydrophonics Bay”. Either way there’s no description indicating what unlocks it, which is kinda mean. I preferred when it was unlocked as “Growing Plot”, that made sense.