Rule of Thumb to know if DI resin is exhausted?

[ervine]

Hi guys,

I was one of those who attended Simon's DIY 3stage DI water purifier. I can't seem to find the thread so I guess I'll just ask here.

I remember he mentioned that one way to know if your DI resin has been exhausted is when it starts to segregate into two distinct layers. Is this true?

I know the best way is to use a TDS meter but I don't have one.

Thanks!

Ervine

[tineng]

nope....the segrating to 2 layers does not shows that the DI resin is exhasted.....

best is still TDS meter...its consisder quite cheap now at 40++....

second best is when you start seeing algae growing.... :D

alternative, brower a meter for a month or 2....record down the total litre process before TDS show a reading.....from then its will be a very rough gauge when you need to change the resin....

[mansiz]

Which LFS have the TDS meter? It's electronic one right?

[ervine]

nope....the segrating to 2 layers does not shows that the DI resin is exhasted.....

best is still TDS meter...its consisder quite cheap now at 40++....

second best is when you start seeing algae growing.... :D

alternative, brower a meter for a month or 2....record down the total litre process before TDS show a reading.....from then its will be a very rough gauge when you need to change the resin....

Ah that's good to know... ok I'll try to see if I can find a TDS meter cheap..