Pond Boss Forums GENERAL QUESTIONS Water chemistry DI, Distilled, Reverse Osmosis, Demineralized...

We use DI water for certain plating and cleaning processes where I work, and for these purposes distilled water will not work as well as DI water (or even work at all). To the best extent of my understanding, DI water should be as pure as distilled water, but it has also been treated to remove free ions. Our DI water has limits on how far it can be piped from the treatment tanks (which look like water softener tanks, although I have very little idea what goes on inside them. They are rotated out by a contractor periodically when they become incapable of successfuly deionizing water, so perhaps the are analogous to softeners in that they need recharging ???), or how long it can sit in an open container, and still be "DI".

No idea on how a DO meter requires DI water.