DI Resins

[andrewsk]

Thanks guys. I do have a TDS and generally wait for the readings to rise before replacing the filters. It is normally about 17-25 ppm. (It used to hover at 0 or 1 when I first got it but not anymore even with all of the filters changed)

I assume that when the DI cartridge has changed color though that it is out or at least close.

Do you guys use cold, hot or mixed water?

[sumpfinfishe]

You might want to calibrate your TDS, you should be able to get the solution at your LFS and see if that changes anything.

[EmilyB]

You should only use cold water.