TDS input low on RODI

[Floyd-]

I just got my 4 stage BRS plus RODI setup last night and tried it out. After running for about 30-40 minutes i checked the input and output. I got 0 on output so thats all good but I was surprised to see input TDS in the range of 1-3! Ive seen people on here claiming TDS input of over 100. Do I just have clean water coming from the city? Do I still need the RODI or can I return this and just use tap?

 

[dank reefer]

I was SUS about it as well

https://www.reef2reef.com/threads/build-thread-1-year-later.644989/post-8251901

 

[WVNed]

The 1-3 is the TDS of the RO water that has passed the first 3 stages. Not the input.

 

[dank reefer]

The 1-3 is the TDS of the RO water that has passed the first 3 stages. Not the input.

Well that's good to know as I always though my water was Super Fresh and Clean. Now i'm scared to know what my true TDS is :eek:

 

[WVNed]

The first number tells you the condition of your RO membrane. The second position tells you the condition of your DI resin.
I added a second dual meter so I do know the TDS of my incoming water and after the first 2 stages.

 

[Floyd-]

The 1-3 is the TDS of the RO water that has passed the first 3 stages. Not the input.

Got ya! I can see where the sensor is at and that makes sense. I could swap it out and put it on the main red line and see the true input! Just put my valve where the sensor is now just as a test.

 

[Floyd-]

The first number tells you the condition of your RO membrane. The second position tells you the condition of your DI resin.
I added a second dual meter so I do know the TDS of my incoming water and after the first 2 stages.

You would think it was list it as a true input and not the input after some filtering. Thanks for the insight into this.

 

[dank reefer]

The first number tells you the condition of your RO membrane. The second position tells you the condition of your DI resin.
I added a second dual meter so I do know the TDS of my incoming water and after the first 2 stages.

I'm gonna have to do the same thing to see where my true incoming TDS is at