RODI has concerning amounts of Minor Elements

[onetootreefor]

So I got another ICP test back on my RODI water after changing out the sediment filter and carbon filters. (I have a 5 stage RODI, so I have 2 carbon filters).

I just got my ICP back and it shows some concerning amounts of Minor Elements. High amounts of Copper, some Zinc, some Nickel, and high amounts of Silicon. After getting my ICP back today, I changed my DI cannister and my RO Membrane.

My inline TDS meter always shows 1 going into DI, and 0 coming out, but I changed everything anyways just because of the test results. What can I do? I can't use this water with this amount of metals in it.

 

[Flippers4pups]

So I got another ICP test back on my RODI water after changing out the sediment filter and carbon filters. (I have a 5 stage RODI, so I have 2 carbon filters).

I just got my ICP back and it shows some concerning amounts of Minor Elements. High amounts of Copper, some Zinc, some Nickel, and high amounts of Silicon. After getting my ICP back today, I changed my DI cannister and my RO Membrane.

My inline TDS meter always shows 1 going into DI, and 0 coming out, but I changed everything anyways just because of the test results. What can I do? I can't use this water with this amount of metals in it.

You can go 6 stage like I just did and run two mix bed resins. It will help some.

 

[onetootreefor]

Did you have 0 tds coming out of your di before you added a 2nd di chamber? Shouldn’t the membrane and di take out the copper?