Rodi out put

[iReefer]

Is it normal? For my rodi output to be 2ppm after making about 300g

ALL new membrane, filter , carbon and di resin.

Tap water is about 350ppn i believed.

Tia

 

[Bryson.bobby]

Rodi should be 0 tds

 

[JoshH]

Rodi should be 0 tds

I think there question is is it normal to have made only 300 gallons and see 1+ TDS.

The answer is a bit of a complicated one as it greatly depends on what's in the water and how the RODI is set up.

 

[Kyuss414]

Yeah should be 0 after the DI. If not, what is the reading after the RO membrane before it goes to DI?

 

[Opus]

Most likely it is within spec if your tap is at 350 tds. Most RO will say they will do 95% rejection though they usually are closer to 98% and some will even go as high as 99%. Not sure how well your membrane is doing without knowing your post membrane tds number. Could be you just didn't pack the DI media tight enough and some of it is being bypassed.