The 20:1 BOE tank at wbmetal actually has 6:1 BOE in it. I changed this on Wednesday and forgot to put a notice up. Wary to all who use it as I am in Socal now and can't put up a sign. Kelvin Liu Staff Engineer Molecular Reflections 6330 Nancy Ridge Drive Suite 107 San Diego, CA 92121 Ph: (858) 623-0259 Fax: (858) 623-0197 kliu at molecularreflections.com