Does anyone know what this brown stuff is?

https://i.redd.it/uif0ov3y3nne1.jpeg

created by theta0123 on 09/03/2025 at 10:19 UTC

126 upvotes, 26 top-level comments (showing 25)

This is a small beekske...creek? That i know for my entire life. And my entire life that brown crap has been in it. Anyone know what it is? Its in limburg in a rural area. Farms are close by. No smell. Plants grow like crazy in it.

Comments

Comment by lutsius-memes at 09/03/2025 at 10:22 UTC

143 upvotes, 1 direct replies

Where in Limburg? Because there are parts where there is alot of Iron on the soil/stone. In Diest alot of creeks and ponds have the same brown stuff on top and its just iron/rust

Comment by deeeevos at 09/03/2025 at 11:02 UTC

77 upvotes, 1 direct replies

ijzeroxide! Tijd om uw primitive technologies pet op te zetten en het te proberen verwerken tot bruikbaar gereedschap!

Comment by happyboy_LOL_ at 09/03/2025 at 11:27 UTC

36 upvotes, 2 direct replies

That is a biofilm of iron-oxidizin bacteria, they feed on the iron present in the water (sometimes natural or by dissolved organic matter). That dissolved organic matter can have pollution as originator. Back in university I did experiments on those bacteria to improve water treatment.

Comment by Smintjes at 09/03/2025 at 10:22 UTC

41 upvotes, 1 direct replies

Ijzer

Comment by Zweinennoedel at 09/03/2025 at 10:23 UTC

42 upvotes, 1 direct replies

Ijzer. Wil zeggen dat er veel in de bodem zit. Is perfect natuurlijk.

Comment by youngrichandfamous at 09/03/2025 at 10:32 UTC

8 upvotes, 1 direct replies

Grondwater, het ijzer oxideert.

Comment by Greedy-Lynx-9706 at 09/03/2025 at 10:31 UTC

5 upvotes, 0 direct replies

ferro

Comment by Andries89 at 09/03/2025 at 10:35 UTC

8 upvotes, 0 direct replies

Als je van West-Vlaanderen was had ik kunnen zeggen dat het de IJzer is

Comment by Virtual-Comment-0000 at 09/03/2025 at 10:23 UTC

6 upvotes, 0 direct replies

Oxidized iron?

Comment by Mammoth-Standard-592 at 09/03/2025 at 10:57 UTC

3 upvotes, 0 direct replies

Also occurs in Voorkempen, I used to live near a ‘beekske’ in the region that bordered our garden and it always looked like this. Thought it was just broken down leaves.

Comment by Zoentje at 09/03/2025 at 20:47 UTC

3 upvotes, 0 direct replies

Nesquik

Comment by Crypto-Raven at 09/03/2025 at 10:39 UTC

6 upvotes, 2 direct replies

Van die rode mist, gemaakt van menselijk organisch materiaal, gespoten als meststof door de tripods.

Comment by PygmeePony at 09/03/2025 at 11:15 UTC

3 upvotes, 0 direct replies

Chocomousse

Comment by ptq at 09/03/2025 at 15:12 UTC

2 upvotes, 0 direct replies

Iron bacteria oxidized? Primitive Technology on youtube tried to get iron from it, afaik with some success.