# Hydrophinic Units missing from Tech Tree
**URL:** https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833
**Category:** HWS General Discussion
**Created:** [December 17, 2022, 12:10pm UTC](https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833 "2022-12-17T12:10:50Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Ixx](https://forum.empyrion-homeworld.net/u/Ixx)
#### Post date: [December 17, 2022, 12:10pm UTC](https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833/1 "2022-12-17T12:10:50Z")
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 …
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### Author:  [@Bob](https://forum.empyrion-homeworld.net/u/Bob)
#### Post date: [December 17, 2022, 12:18pm UTC](https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833/2 "2022-12-17T12:18:30Z")
first off restart the game and try again. this is usually a sign of swapping servers and/or save game files without restarting the game in between. configurations tend to overlap…
this is Empyrion ME: Memoryleeks Edition 😉
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### Author:  [@Ixx](https://forum.empyrion-homeworld.net/u/Ixx)
#### Post date: [December 17, 2022, 12:31pm UTC](https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833/3 "2022-12-17T12:31:25Z")
Thanks for the reply and the help =)
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.
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### Author:  [@Bob](https://forum.empyrion-homeworld.net/u/Bob)
#### Post date: [December 17, 2022, 12:52pm UTC](https://forum.empyrion-homeworld.net/t/hydrophinic-units-missing-from-tech-tree/33833/4 "2022-12-17T12:52:10Z")
I don’t believe you have to unlock them in re. they are a standard device if I remember correctly.
re is its own special animal. it’s best to forget everything you know about the game and learn something completely different.