Strange icp values of RO

[JonasRoman]

Look at icp of RO. I have always some Si, but these values! Sr, quite high po4, sodium, ca, Mn and sky high Si etc. I have never got anything else than Si. Membrane is 1 year or so. And yes , to be honest, po4 in tank has raised quite much in short time, and also Si, and yes some diatoms on sand. So maybe this was explanation of my increasing po4 after all. In tank its 0.1 now.
I will change membrane and prefilter to be sure but anyway, isn't these values odd that it come so fast? Last icp 6 weeks ago, then only some Si. Can a membrane go bad suddenly??

Jonas

 

[EnterName]

Is this just RO or do you have DI as well?

I mean, most of the elements weren't detectable or low so overall the membrane seems to be holding back a lot, but Si can be hard to get rid of in my experience even with DI.
Sometimes the water digs "tunnels" into the resin and can pass more or less unfiltered through the filter cartridges this way.

Do you happen to have a conductivity meter or TDS meter that is suited for RO/DI testing? I would double check if you get any readings above 0ppm TDS or 1µS/cm conductivity.

 

[JonasRoman]

Is this just RO or do you have DI as well?

I mean, most of the elements weren't detectable or low so overall the membrane seems to be holding back a lot, but Si can be hard to get rid of in my experience even with DI.
Sometimes the water digs "tunnels" into the resin and can pass more or less unfiltered through the filter cartridges this way.

Do you happen to have a conductivity meter or TDS meter that is suited for RO/DI testing? I would double check if you get any readings above 0ppm TDS or 1µS/cm conductivity.

I have DI aswell. Si is always not zero but this time its 50 times higher than I usually have. And I have never had any other ions, always zero on all the others.

I have ordered a new membrane