Bac water. What Membrane?

[SuperSwede]

Do you mean actual sterile water? Or just a fresh container of distilled?

I would definitely filter unless you have access to sterile water. Regulations on bottled water are pretty lax. Tap water is more regulated..

It’s sterile water from Swedish pharmacy. Not the same as distilled water from grocery store.

Edit: Cant’t buy bac water without prescription where live. Prefer to do my own instead of buying from some ug labs.

 

[master.on]

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.

With just 0.9% BA any membrane will do.

See if you can get 0.10 um filters as some studies show some bacteria can pass trough 0.22 but not 0.10.
Water is, well, water thin so it shouldn't be as hard to filter as oil is.

It’s sterile water from Swedish pharmacy. Not the same as distilled water from grocery store.

Edit: Cant’t buy bac water without prescription where live. Prefer to do my own instead of buying from some ug labs.

You can use sterile water to make bacteriostatic water
just add 0.9% BA and refilter.

While distilled water is cheap, like $3 per gallon
sterile water may be purer.