View Full Version : How long can you keep Ro/DI water?

03/13/2012, 08:29 AM
Curious as to how long you can keep Ro/DI water around before it goes bad. I like to make a large batch and use it for water changes and top offs over the course of a month before making another big batch. Is there any danger that the water will start to grow things in it or go bad within a month?

Randy Holmes-Farley
03/13/2012, 08:40 AM
It won't go bad. I store mine for weeks. :)

03/13/2012, 10:38 AM
Just be sure your TDS is at zero and your good to go. I would try to keep it as air tight as possible.