Yeah really I didn't know it was that big of a deal until my Di ran out and bam... Basically it was only getting pre filtered. I read a ton and found out that it will ruin your membrane to even have hot water going into it for a very short time. I wanted to make sure and let people know so thy won't make the same mistake. I have thought about running a second di, but am waiting to see how it goes with just the one. My friend goes though DI like every other week so I recommended what you wrote about the di saver and 2 di. He has ordered a second chamber for another di and will be setting it up. Hopefully this will make his di stretch more then a couple weeks. Thanks again for the great advice!!
Heidi