I used FM and everybottle of bak that ordered was outdated and had the foul spoiled smell they manufacturer advised about. I went on the ultralith forum and was advised that the product was still good 6 months after the best before date on the bottle, the problem was that the bottles was sent past these dates. Hopefully the manufacturer has fixed these problems.
I tried for 6 months and eventually went with zeo because of the ability of getting fresher stock. I did like the ultralife and still use it. I think zeo is easier to obtain from LFS as well the only way to access the bac driven system here and in calgary is from online vendors. I was in Calgary on the weekend and Daniel at Wais does carry FM products but not the Bac system he carries the Zeo products for a Bac driven system.
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