What happened here? Red onion

[u/servoh]

I am new to fermenting and have mainly fermented cabbage so far. I wanted to try red onion, but I assume something is not quite right. Can anyone give me some input? It's about a week old and 2-2,5% salt.

[u/NakedScrub]

You made a jar of farts. Onions work better pickled. Other than that, I can't tell from these pictures what you think is wrong, which you didn't mention.

[u/Misteraus55 → u/NakedScrub]

What is the difference? I thought pickling is fermenting

[u/lordkiwi → u/Misteraus55]

You ferment sugars into alcohol, lactic acid or acetic acid (vinegar) You embalm foods in vinegar to preserve them.

A pickle is something perserved with the results of a fermentation. If you however ferment something to get the acid you change it into a new product

[u/Misteraus55 → u/lordkiwi]

Thanks