"alien" > wrote in message
...
> I have some Elderberry wine that I started early september. I maxed the
> alcohol out on the yeast (about 18%) and it's turning into quite a nice
> port style wine.
>
> A few days ago I noticed that something large was floating on the
> surface. I sulphited it and left it, but it didn't go away. So today I
> racked it. The large something was left behind and looked like sediment
> that had clumped together (about half of it). When I rinsed the
> demijohn it dissolved under the water pressure very quickly.
>
> Only one demijohn has done this, the other hasn't. Any ideas as to why?
> Is it something simple such as gasses getting trapped and lifting it up?

Sounds like "Mother of Vinegar" a floating mass of vinegar producing
bacteria....