I use 1/8th every time, and have been more than happy with the results. Also, kep in mine its not a full 2 liters if that helps, you're only suppose to fill it 90% of the way.<br><br> <br><br><br>In a message dated 12/2/2009 6:33:09 P.M. Eastern Standard Time, manu_opal@yahoo.com writes:<br><br> <br...