1 year ICP results ALL FOR REEF

[allenk4]

Zinc is used as a stabilizer in PVC and maybe other plastics. That may be the source in the RO/DI, but it may also be getting directly into the tank if similar plastics are used there.

In any case, I likely would not worry about it in the current scenario.

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“According to current understanding, zinc does not typically leach into water from PVC pipes because PVC itself does not contain zinc; the zinc is usually found in galvanized pipes, which are coated with zinc, and not in the plastic material of PVC pipes, meaning there is no significant risk of zinc getting into your water from standard PVC plumbing”

 

[Randy Holmes-Farley]

“According to current understanding, zinc does not typically leach into water from PVC pipes because PVC itself does not contain zinc; the zinc is usually found in galvanized pipes, which are coated with zinc, and not in the plastic material of PVC pipes, meaning there is no significant risk of zinc getting into your water from standard PVC plumbing”

You put that in quotes. Who are you quoting?

 

[allenk4]

Maybe. I don't think you can say where the zinc in the display came from. Remember that if there is 3 ug/l in the top off water and you replace only 1% evaporation daily, then it is adding only 0.03 ug/l per day, and if the tank has 6 ug/L, that top off may not be the source.

Even if added in small quantities, if that substance is not consumed and broken down or exported…it will continue to accumulate, no matter how small the input.

Bacteria and corals consume Zinc

 

[Randy Holmes-Farley]

Even if added in small quantities, if that substance is not consumed and broken down or exported…it will continue to accumulate, no matter how small the input.

Bacteria and corals consume Zinc

Please answer my question.

 

[allenk4]

You put that in quotes. Who are you quoting?

Google Search

 

[allenk4]

Please answer my question.

Hey Randy, I posted a link to the search I used regarding presence of Zinc in PVC piping.

Was that the question? Sorry if I misunderstood.

 

[Randy Holmes-Farley]

How you ask the question makes all the difference.

You probably think I’m being harsh, but put this into your same search:

Is calcium zinc used as a stabilizer in pvc?

Here’s what my search AI says:


AI Overview

Yes, "calcium zinc" is commonly used as a stabilizer in PVC (polyvinyl chloride), acting as a heat stabilizer to prevent thermal degradation during processing and use of the plastic material; it is considered a safer and more environmentally friendly option compared to traditional lead-based stabilizers.

 

[allenk4]

How you ask the question makes all the difference.

You probably think I’m being harsh, but put this into your same search:

Is calcium zinc used as a stabilizer in pvc?

Here’s what my search AI says:


AI Overview

Yes, "calcium zinc" is commonly used as a stabilizer in PVC (polyvinyl chloride), acting as a heat stabilizer to prevent thermal degradation during processing and use of the plastic material; it is considered a safer and more environmentally friendly option compared to traditional lead-based stabilizers.

Yes, I agree you are “being harsh”

Google Search

We are both interested in the issue this Reefer is experiencing and I hope we are all focused on tracking down what’s going on with his RODI water that appears to be contributing Zinc.

If it was me, I would run a test on the Tap Water and the RODI to trace the source back one more level. The manufacturers generally claim that their systems remove 99% of Zinc.

 

[Randy Holmes-Farley]

Yes, I agree you are “being harsh”

Google Search

We are both interested in the issue this Reefer is experiencing and I hope we are all focused on tracking down what’s going on with his RODI water that appears to be contributing Zinc.

If it was me, I would run a test on the Tap Water and the RODI to trace the source back one more level. The manufacturers generally claim that their systems remove 99% of Zinc.

I agree that ro/di systems remove zinc and the water coming from a 0 ppm tds system is unlikely to be a problematic source.

 

[irischan]

In testing metal abundance by ICP-OES or ICPMS, zinc is always a tricky one to be measured accurately. Zinc is literally everywhere in our environment. A dust floating in air can cause serious zinc contamination to sample. Can you tell more about how do you take sample water into the container provided?

 

[805reeftank]

In testing metal abundance by ICP-OES or ICPMS, zinc is always a tricky one to be measured accurately. Zinc is literally everywhere in our environment. A dust floating in air can cause serious zinc contamination to sample. Can you tell more about how do you take sample water into the container provided?

I rinsed the tube in RODI water from my jugs a couple times and then filled it.

 

[rishma]

My last RODI ICP showed 1.71 µg/l.

My zinc in the tank was also a little bit elevated at 7.24 µg/l.

I am interested in tracking this down too.

 

[Magic031707]

Where is the Cooper coming from? I've heard red sea does have some in it. How true is that?

 

[805reeftank]

Where is the Cooper coming from? I've heard red sea does have some in it. How true is that?

Either the all for reef or the blue bucket

 

[Pod_01]

Where is the Cooper coming from? I've heard red sea does have some in it. How true is that?

Copper (Cu) is essential trace element. It is in all salt mixes and AFR.

 

[fandaga]

Your tank looks great! I’m also almost at the one year mark on my 46g AIO mixed reef and have been dosing AFR as well but only 5-10 mL per day based on alk demand from a Trident. I have more soft corals (several leathers) and less SPS. My recent ICP results were pretty similar except low iodine but Mn was good. Fe was also not detected. I didn’t have the Zn issue, but based on how awesome the tank looks, it doesn’t seem to be an issue.

 

[rishma]

Your tank looks great! I’m also almost at the one year mark on my 46g AIO mixed reef and have been dosing AFR as well but only 5-10 mL per day based on alk demand from a Trident. I have more soft corals (several leathers) and less SPS. My recent ICP results were pretty similar except low iodine but Mn was good. Fe was also not detected. I didn’t have the Zn issue, but based on how awesome the tank looks, it doesn’t seem to be an issue.

Interesting your Fe was ND and Mn was good. My Mn was low and fe was good. I guess each tank consumes things a little differently. I add a little iodine every couple of weeks and that has kept iodine good for a little over a year.

 

[805reeftank]

Your tank looks great! I’m also almost at the one year mark on my 46g AIO mixed reef and have been dosing AFR as well but only 5-10 mL per day based on alk demand from a Trident. I have more soft corals (several leathers) and less SPS. My recent ICP results were pretty similar except low iodine but Mn was good. Fe was also not detected. I didn’t have the Zn issue, but based on how awesome the tank looks, it doesn’t seem to be an issue.

I dose 50ml a day and keep my alk around 7.4 in the am it can go up to 8.2 by the night time. As for the zinc we’ll see what happens on the next ICP in month. Along with the other trace with isol8 mt

 

[805reeftank]

Interesting your Fe was ND and Mn was good. My Mn was low and fe was good. I guess each tank consumes things a little differently. I add a little iodine every couple of weeks and that has kept iodine good for a little over a year.

That’s the thing everyone’s tank is different just based on the coral we decide to keep and that doesn’t even take into account the size they grow too.

 

[fandaga]

So I just realized that my Zn result is only a little lower than yours. My ICP test was from Fauna Marin, which was recommended by my LFS. It looks like based on their chart that your Zn result would actually be considered at the “ideal” value.