Calgary TDS readings?

[monza]

I guess I'll update this.

Replaced my membrane now before DI TDS is 1 after 0

I have no back flush on my unit and was told if it's used everyday it is not needed?

My RO/Di dealer was great three free Di cartridges, any quanity at 1/2 price and a new membrane half price. My membrane never worked right from the start. I didn't now and went through 6-7 Di units in a year or so.

Dave