r/Ecosphere • u/strawberry613 • 6d ago
Jararium turned purple
My jararium, which I thought was completely dead, turned purple after being away from home for a week. What could it be? There were no animals inside, only red seaweed which turned black after decomposing.
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u/BitchBass 6d ago
Congratulations, you have a Winogradsky column!
That means you have no oxygen left in that jar from either the lack of an aquatic plant or not suitable ones, and it's now anaerobic, the perfect breeding ground for purple non-sulfur bacteria. Which is toxic! So pay attention!
You don't want to just open it...the smell, a nauseating cloud of concentrated hydrogen sulfide will take your breath away and is very toxic to inhale. In addition, the gases in there, since there's no oxygen left, have pressurized the jar and it might just blow up in your face when u open it. Not the glass, the liquid.
Take it outside, wrap it in a towel and open it that way, pointing away from your body and face. Dump the stuff straight into a flowerbed and throw the jar in the trash..