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Airlock pulled water through

Posted: Wed Nov 25, 2020 1:50 am
by LordMareck
Hey all,

I have a strange problem. I use a simple cup airlock. And for the first time. the airflow on a bucket reversed.
Pulling all the water out of the cup into the bucket.
I have done about 30 buckets before, never seen this.

Any advice on what causes this?