This is true, although most of us don't have access to natural mountain springs. 
Most water reports will show TDS, chlorine, etc. This will help narrow down the "depends" part of the question.
Quote:
Originally Posted by chadfarmer
depends on the water going into the unit
|
__________________
"Let the future tell the truth and evaluate each one according to his work and accomplishments. The present is theirs; the future, for which I really worked, is mine."
-Tesla
Current Tank Info: 180g mixed reef, 90g rimless cube.
|