"J Dixon" > wrote in message
...
> Jim,
> Some add glycerin to inhibit evaporation.

Glycerin is not only not able to evaporate at room temps, but it is also
hygroscopic, means it soaks up water from the air.

HTH
> John Dixon
> "Jim" > wrote in message
> news
> > I saw a posting for a liquid to put in air locks to reduce evaporation
> > but for the life of me I cannot remember what it was, could anyone
> > help me out. I have been using a potassium metabisulphite and water
> > solution but it seams to evaporate quickly.
>
>