so I found bass killers recipe which seems extremely easy to make bac water. Just use distilled water add .9%BA to the total. For instance 100ml bac water is 99ml distilled water and 1ml BA. Then filter into sterile vail and done. What type of membrane are you guys using to filter water. I kno .22 is good but are we using nylon, pvdf or something different? For my oils I use nylon. Seems google shows pvdf for water is okay for other applications. Comments appreciated.