When To Change Ro Membranes?

[stefday]

Hi,

I have recently started to make my own RO water using an Osmotics unit. I have a TDS meter and it was running at 000 but is now showing 001.

At what level would you need to change the membrane?

Any advice would be welcome.

 

[Morri]

Test the TDS of the water before it goes into the DI might just need new resin

 

[drsquirrel]

How recent is recently?

And where is your unit? If it's very cold I find TDS readings can be affected slightly (also lowering your RO efficiency).