ICP Test Results

[hllb]

I got my ICP test results and had a couple of questions. First, it looks like my salinity looks low, but my tests show it at 1.026. I use a Milwaukee meter (35 ppt) and just double chec,ked with a refractometer (1.026, and verified with BRS calibration fluid that it's exactly on target). So do I trust this test, or my calibrated equipment? Looks like I can bring up my trace elements a little too - I had been dosing Red Sea trace (ABCD) but have held off for a couple of weeks until I got this test back. The calcium was spot on with my test and while I didn't test the mag, it's in line with what my tank typically runs. For phosphorous, my test came in at .074 ppm and the ICP says 0 ppm, so I'm guessing that may be within the margin of error?

Bottom line, I'm not sure what, if anything to do here (other than to dose trace). I don't want to raise salinity when my testing disagrees with the ICP results.

 

[hllb]

I should add, I do not run an ATO, so no chance that it's malfunctioning.

 

[SPS2020]

I'd go with my calibrated equipment if I were you...especially if the the tank livestock looks healthy.

 

[hllb]

I'd go with my calibrated equipment if I were you...especially if the the tank livestock looks healthy.

That's what I'm thinking too, but boy, that Na seems off in the ICP test. I know (now LOL) that this is probably not the best test so perhaps I order a different test.

 

[hllb]

Anyone else have thoughts?

 

[Randy Holmes-Farley]

I do not know how accurate the results are, but I would not assume salinity is low because chloride is actually high.

 

[hllb]

I do not know how accurate the results are, but I would not assume salinity is low because chloride is actually high.

Is that a problem? My RO test came back fine, except .07 ppm of rubidium (Calcium was .01ppm but everything else was 0)

 

[Randy Holmes-Farley]

Is that a problem? My RO test came back fine, except .07 ppm of rubidium (Calcium was .01ppm but everything else was 0)

RO water tests rarely showing anything important, IMO, unless it is not 0 ppm TDS.

I don't see a salinity "problem", but I would raise potassium.

 

[hllb]

RO water tests rarely showing anything important, IMO, unless it is not 0 ppm TDS.

I don't see a salinity "problem", but I would raise potassium.

Thanks - I will do that. Appreciate the input.

 

[thatmanMIKEson]

I should add, I do not run an ATO, so no chance that it's malfunctioning.

you should give ATO a second chance or first, i use to think it was no big deal but since i have started using one i wouldnt go back. speaking of the tunze osmolator of course.. its awsome and adds super stability to your salinity

 

[hllb]

you should give ATO a second chance or first, i use to think it was no big deal but since i have started using one i wouldnt go back. speaking of the tunze osmolator of course.. its awsome and adds super stability to your salinity

I have a biocube and with the full hood, it's really not needed. Only occasionally will I have enough evaporation in between my water changes to change the salinity. And that's only during the summer if my fan has been running a lot for cooling. Otherwise, I don't need to top it off.

 

[Zhubbell]

you should give ATO a second chance or first, i use to think it was no big deal but since i have started using one i wouldnt go back. speaking of the tunze osmolator of course.. its awsome and adds super stability to your salinity

I was very resilient after having tried it a few times like 8 years ago…
So glad my brother finally convinced me to get the little duetto ATO.
Instant installation, super intuitive and easy to use, and it makes such a big difference.
I run 500 total gallons and it does a great job.

 

[Rick Mathew]

I got my ICP test results and had a couple of questions. First, it looks like my salinity looks low, but my tests show it at 1.026. I use a Milwaukee meter (35 ppt) and just double chec,ked with a refractometer (1.026, and verified with BRS calibration fluid that it's exactly on target). So do I trust this test, or my calibrated equipment? Looks like I can bring up my trace elements a little too - I had been dosing Red Sea trace (ABCD) but have held off for a couple of weeks until I got this test back. The calcium was spot on with my test and while I didn't test the mag, it's in line with what my tank typically runs. For phosphorous, my test came in at .074 ppm and the ICP says 0 ppm, so I'm guessing that may be within the margin of error?

Bottom line, I'm not sure what, if anything to do here (other than to dose trace). I don't want to raise salinity when my testing disagrees with the ICP results.

I got my ICP test results and had a couple of questions. First, it looks like my salinity looks low, but my tests show it at 1.026. I use a Milwaukee meter (35 ppt) and just double chec,ked with a refractometer (1.026, and verified with BRS calibration fluid that it's exactly on target). So do I trust this test, or my calibrated equipment? Looks like I can bring up my trace elements a little too - I had been dosing Red Sea trace (ABCD) but have held off for a couple of weeks until I got this test back. The calcium was spot on with my test and while I didn't test the mag, it's in line with what my tank typically runs. For phosphorous, my test came in at .074 ppm and the ICP says 0 ppm, so I'm guessing that may be within the margin of error?

Bottom line, I'm not sure what, if anything to do here (other than to dose trace). I don't want to raise salinity when my testing disagrees with the ICP results.

How is the tank doing?...Are all the inhabitance doing well...If so I would be temped to do nothing...might consider bumping up potassium but not at all critical.

The phrase Randy used "if the results are accurate" is important to keep in mind...ICP measurements are not "perfect". On your phosphorous measurement those results compared to home test are not unusual...You can read about it here...along with some comments on on ICP measurements

SAMPLE STORAGE AND ITS IMPACT ON MEASUREMENT RESULTS PART 3

In my last post in July of last year I presented the case that samples sent for ICP analysis were not completely stable and that during the storage time before testing there was a change (reduction) in the measurable level of Phosphorous and thus...

www.reef2reef.com

Hope this helps

 

[Dan_P]

I got my ICP test results and had a couple of questions. First, it looks like my salinity looks low, but my tests show it at 1.026. I use a Milwaukee meter (35 ppt) and just double chec,ked with a refractometer (1.026, and verified with BRS calibration fluid that it's exactly on target). So do I trust this test, or my calibrated equipment? Looks like I can bring up my trace elements a little too - I had been dosing Red Sea trace (ABCD) but have held off for a couple of weeks until I got this test back. The calcium was spot on with my test and while I didn't test the mag, it's in line with what my tank typically runs. For phosphorous, my test came in at .074 ppm and the ICP says 0 ppm, so I'm guessing that may be within the margin of error?

Bottom line, I'm not sure what, if anything to do here (other than to dose trace). I don't want to raise salinity when my testing disagrees with the ICP results.

Stick with local measurements.