Yep, campden tablets are 1 per gallon.

I do find it hard to beleive that a can of concentrate would make
either 3 or 5 gallons with no other adjustment. I am assuming that it
is vinters harvest or oregon fruit products?

Here is a link to a more or less typical recipe that uses a 6 lb can of
vinters harvest elderberry concentrate:

http://www.homebrewheaven.com/elderb...-wine-base.htm

as you can see they add sugar, acid blend, pectic enzyme (aids in
extraction and helps prevent haze) and nutrient before fermentation.

If that is the case for you, there is good news. You can add the
sugar, nutrient and acid and still end up with a good wine. Having a
bit of other microbial activity in a wine must is not always a bad
thing. Some winemakers actually like a bit of brett character in their
wines for instance. Assuming that you were low on the SG, there was
not a great deal of fermentables that they could have gotten to.

I would rack off of whatever is growing on the top (if possible), add
the sugar and other additives and pitch several packets of yeast to
really get it going. I do not think you have a major contamination
issue, since you did add some sulfite to it. the amount of money you
will spend to adjust it is not all that great and it is alway worth a
try to save it.

I had a mulberry wine spontaneously ferment on me this year and it may
be the best one I have ever made.
wrote:
Droopy wrote:
So it seems you did all that right. Why you have whatever growing in
it that you do I cannot say for sure. first, did you take a SG
reading? One can of concentrate to 4 galons of water seems really
thin. You should have an SG of 1.095-1.110 or so for most wines.

It was a very large can. The back of the can stated that it could be
used for a 5 gallon wine or a 3 gallon wine, the 3 gallon obviously
being of higher gravity. I didn't take a gravity reading, but I did use
the can as was indicated on the label and, well, it was just a very
large can :-)

The instructions said 5 tablets for the 5 gallon version, 3 for the 3
gallon. I decided to go for 4 gallons, so I used 4 tablets. I assume
that was a proper thing to do...

Scott