ICP-Analysis

[MightyMouse85]

I see some levels are low so my test kits are bad. Can someone look at this and give me some recommendations?

 

[RegalMark]

If theres Chlorine in tour water id check to see if your RODI filters need replacing and it looks like water changes would fix the rest of those parameters.

 

[LouieP]

sodium chloride is salt!

 

[RegalMark]

Yes but it says Chlorine second row down

 

[JimWelsh]

Yes but it says Chlorine second row down

You are correct. That much chlorine would be bad. In this context, it implies chloride, though. It is the element named "chlorine" in the chloride form.

 

[rushbattle]

Your salinity is way low. That's why everything else reads low.

 

[dbjonesjr]

Looks like you've been using a hydrometer to me. Get your salinity up!

 

[rushbattle]

How are you measuring salinity? Salinity is the reference point for all other levels in the water.

 

[RegalMark]

You are correct. That much chlorine would be bad. In this context, it implies chloride, though. It is the element named "chlorine" in the chloride form.

Oh ok didnt know that

 

[MightyMouse85]

I use a refractometer that I calibrate every 3 uses. It shows 1.025 and even the lfs tested and showed 1.025

 

[rushbattle]

I use a refractometer that I calibrate every 3 uses. It shows 1.025 and even the lfs tested and showed 1.025

I’m inclined to believe ICP-Analysis generally in this case. The salinity calc from ICP is subject to operator and machine error for such large peaks, but this is far enough from reference to believe easily. I didn’t look at them all, but the other ions agree generally, and they should be pretty easily quantified via ICP. If it was just a few ppt off I would not look too far into it, but below 30ppt salinity is danger zone for inverts, like most coral. How are you calibrating the refractometer? I would suggest making a refractive calibration solution yourself to double check everything, doesn’t cost much at all.

http://www.reefkeeping.com/issues/2004-06/rhf/index.php

 

[MightyMouse85]

I do have a calibration solution. I dont do the RODI water.

 

[MightyMouse85]

What are the odds that both my LFS and I are wrong on it? Especially when we come up with the exact same number?