Blang
Established Member
I have a UV sterilizer! I won't give my mistking a vinegar douche!I think there's a very good chance that at some point, you will have either algae or bacteria growing inside your mister lines. It's not a sealed system, and its just nature that something would find that to be the perfect environment. That's why I replace the lines periodically, too, to catch anything that might be resistant to a vinegar solution.
We have mildew here (and who knows what else) that seems to do just fine in lightless wet environment like plumbing tubes, toilet tanks, and faucet heads. It starts as a clear slime, develops into an orange slime, and dies into a thick black slime. Fun. A little vinegar or bleach goes a long way to keeping that growth in check for us.
Like described above, PPM is not a level of sterility; it's a measure of solid materials in the water like minerals or metal. RO catches most of the solids, so does distilled water. Bottled water is just as "heavy" or "hard" as most tap water because minerals are often added in for taste. (FYI, most bottled water is sources from municipal sources with minute additional filtration - not a pure mountain spring like they want you to believe.)
You can have extraordinarily low PPM and still have bacterial levels through the roof. You wouldn't want that spraying all over your poor cham.