Cheers Mate So if I get a sachet of this which is between 5/7Grams how much do I put in each demijohn Sorry my maths is not that great I was brought up in ãSD and quill pens days when you had ink well in your desk and dipped girls pigtails in the ink and flicked your ruler of blobs of in paper at a kid did not like and if like me get hit with the school rubber from about 30 feet away travelling at Miles a hour and a perfect hit every time by the tutor must of been trained by the army before coming teachers. Sorry went of subject I tried wilcos but can not see it :-(