Jim,
Some add glycerin to inhibit evaporation.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.