"A. J. Rawls" > wrote in message
...
> I am having trouble with Campden Tablets and Apple Wines again...
> Addition of Campden to clear Apple wines result in an opaque wine that
> does not fal lclear easily.
>
> Does anyone have a formula for making a soultion of Potassium
> Metabisulfite or Sodium Metabisulfite for addition to 1 U.S. gallon
> Carboys; 11.5 liter carboys and 23 liter carboys?

I make a stock solution of 220grams/liter potassium metabisulfite. 20ml/60
gallon barrel raises the free SO2 by 10 ppm.

You can scale that down for home winemaking, but don't let it sit unused for
more than ~6 months. The stock solution has a limited shelf life, but I use
it quickly enough that it isn't a problem for me. BTW, the dry chemical is
reactive to air, so keep it tightly sealed in a glass jar. Even so, it
should be replaced every couple of years or so.

Tom S