copper 0.18

aerialdronemaster · May 13, 2020

hello
I just tested copper in my DT, and it " I am surprised" shows 0.18 , don't understand why
PH is 8.2
Alkalinity 8.9
temp is 75F
phosphate 0.07
salinity 35

now, I am using RO/DI 5 stage system, TDS shows 0 and what is my big surprise? i tested the RO/DI water and it tested 0.10 !! what !!

as far as I know any copper is bad, to basically, something is not tight with the RO/DI

Miller535 · May 13, 2020

What did you test it with?

Hanna copper and api, and those kind of kits are wildly inaccurate at low levels of copper.

aerialdronemaster · May 13, 2020

Miller535 said:
What did you test it with?

Hanna copper and api, and those kind of kits are wildly inaccurate at low levels of copper.

Yes I am using hanna , I thought they are pretty accurate.

Miller535 · May 13, 2020

aerialdronemaster said:
Yes I am using hanna , I thought they are pretty accurate.

They hanna copper checker is, but not at low levels. It's meant for more like 1+ppm copper. Really what it is meant for is raising and monitoring copper when treating fish for parasites in a quarantine tank, not for reading low level copper in a Display tank.

What made you check copper? Does something seem off or wrong with your tank?

Miller535 · May 13, 2020

Even based off of the info Hanna has for resolution and accuracy it can be off by as much as .06ppm. I still stick with anything below 1ppm and I wouldn't trust it.

aerialdronemaster · May 13, 2020

Miller535 said:
They hanna copper checker is, but not at low levels. It's meant for more like 1+ppm copper. Really what it is meant for is raising and monitoring copper when treating fish for parasites in a quarantine tank, not for reading low level copper in a Display tank.

What made you check copper? Does something seem off or wrong with your tank?
[/QUOTE

I am trying to rescue my blue tang , that's why I bought the hanna copper.

I was jut curious to check the copper in DT. Just curiosity, then the RO/DI wager , and I was surprised.

Miller535 · May 13, 2020

If you want truly accurate levels of possible contaminants like copper, I can not strongly enough recommend getting an ICP test like from Triton or ATI. I personally prefer Triton, especially since even though they are in California and I am in Pa, I still get my results back is 3 to 4 days. Where as ATI also test's your RODI water for free, but it's close to 3 weeks to get results back as their lab is in Germany.