1 year ICP results ALL FOR REEF

[rishma]

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.

perfect example, I don’t know if there is a scientific basis for the ranges from the ICP companies. I’m personally not worried about the Zn level in my tank but being in my RODI bothers me a little.

 

[eggie]

I do ICP almost monthly in December I had zinc 5 ug/l in my RO water even my TDS showing 0 so I order new RODI filters I always use Spectrapure Silica Buster and Max Cap for my DI. Change as well my sediment and carbon.
Sent a new ICP on January and Zinc was not detected on my RO and my tank levels of Zinc drop 40 to 15 ug/l
I use Oceamo MS test always
My income water comes to cooper tubing from the street to my home
My RO system connects thru standard tubing and water lands in a 15 gallon container that I use for water changes and refill my Top off and Kalk
Hope this info help others

 

[Randy Holmes-Farley]

perfect example, I don’t know if there is a scientific basis for the ranges from the ICP companies. I’m personally not worried about the Zn level in my tank but being in my RODI bothers me a little.

I’m not aware of data that supports the ranges used in most cases, and I’d personally not have too much confidence in them.

Even ignoring the issue of different chemical forms being treated as if they were the same, every organism in the tank may have a different acceptable range.

Sometimes the ranges are ridiculously narrow, and many folks get warnings about things being “critically high” or low or some such wording when there’s no apparent problem in the aquarists assessment.

I’d suggest folks use icp as a guide of what might be useful to do, not necessarily what must be done.

 

[805reeftank]

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.

I’m not to worried about the zinc in the tank. I’m worried about zinc in the RODI, I don’t want that building up in the tank. But it does seem every provider has a different level

 

[805reeftank]

I do ICP almost monthly in December I had zinc 5 ug/l in my RO water even my TDS showing 0 so I order new RODI filters I always use Spectrapure Silica Buster and Max Cap for my DI. Change as well my sediment and carbon.
Sent a new ICP on January and Zinc was not detected on my RO and my tank levels of Zinc drop 40 to 15 ug/l
I use Oceamo MS test always
My income water comes to cooper tubing from the street to my home
My RO system connects thru standard tubing and water lands in a 15 gallon container that I use for water changes and refill my Top off and Kalk
Hope this info help others

We’ll see what the next ICP says, I have new filters I’ll just have to order a membrane.

 

[805reeftank]

I’m not aware of data that supports the ranges used in most cases, and I’d personally not have too much confidence in them.

Even ignoring the issue of different chemical forms being treated as if they were the same, every organism in the tank may have a different acceptable range.

Sometimes the ranges are ridiculously narrow, and many folks get warnings about things being “critically high” or low or some such wording when there’s no apparent problem in the aquarists assessment.

I’d suggest folks use icp as a guide of what might be useful to do, not necessarily what must be done.

That’s exactly how I’m approaching it. I don’t have any problems in my tank. So I decided to send one in as a base. I’ll take into account the levels and go from there. I don’t like that high zinc the the ro though seems odd that’s the only thing in there.

Let me ask you this, If my membrane hadn’t been flushed would that cause zinc to build up? I just installed a flush valve it didn’t have one it had a restrictor on it but no flush. I just flushed it for 5mins.

 

[Randy Holmes-Farley]

That’s exactly how I’m approaching it. I don’t have any problems in my tank. So I decided to send one in as a base. I’ll take into account the levels and go from there. I don’t like that high zinc the the ro though seems odd that’s the only thing in there.

Let me ask you this, If my membrane hadn’t been flushed would that cause zinc to build up? I just installed a flush valve it didn’t have one it had a restrictor on it but no flush. I just flushed it for 5mins.

Don't think so. The membrane should get rid of most zinc, and the DI should mop up the remainder unless it is depleted.

 

[eggie]

We’ll see what the next ICP says, I have new filters I’ll just have to order a membrane.

Make sure you get good DI filters, there is so much bad filters out there that are poorly made.

 

[Randy Holmes-Farley]

Make sure you get good DI filters, there is so much bad filters out there that are poorly made.

Are you meaning the DI cartridges? Do you have thoughts on which are not good?

 

[805reeftank]

Make sure you get good DI filters, there is so much bad filters out there that are poorly made.

I’m using the brs dual di canisters with there color changing di resin

 

[805reeftank]

Don't think so. The membrane should get rid of most zinc, and the DI should mop up the remainder unless it is depleted.

Ok was just a thought.

 

[eggie]

Are you meaning the DI cartridges? Do you have thoughts on which are not good?

Yes, I see some brands that dont pack there DI resins right, leaving the resins loose and not well compacted and tight on the cartridge. That makes a lot of difference.

 

[Randy Holmes-Farley]

Yes, I see some brands that dont pack there DI resins right, leaving the resins loose and not well compacted and tight on the cartridge. That makes a lot of difference.

OK, I can see that as a concern.

 

[allenk4]

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.

Is there additional information in the possibility of Zinc from PVC leeching into water?

I looked around the internet a bit more last night, but couldn’t find anything indicating that Zinc from PVC could Leech into water.

 

[allenk4]

I’m not to worried about the zinc in the tank. I’m worried about zinc in the RODI, I don’t want that building up in the tank. But it does seem every provider has a different level

Glad to hear you are getting great results in the tank.

One thing that hasn’t been mentioned in the thread is the impact of water pressure on the effectiveness of a RODI system. I think Randy Holmes Farley may have posted a link to a study that showed decreased effect on Zinc at lower pressures.

It seems most manufacturers recommend pressures of 45 psi or higher. If your RODI doesn’t have a psi gauge, most municipal water departments will come out and test the water pressure to your home or apartment for free. In my locality, you don’t even need to be home, they test at the outside hose bib.

What an amazing resource Reef2Reef is. People at least trying to help people.

 

[Randy Holmes-Farley]

Is there additional information in the possibility of Zinc from PVC leeching into water?

I looked around the internet a bit more last night, but couldn’t find anything indicating that Zinc from PVC could Leech into water.

Sure, here's one:

Loading…

onlinelibrary.wiley.com

Influence of processing conditions on the leaching of thermal stabilizers from plasticized polyvinyl chloride in the presence of water

Abstract
Plasticized PVC formulations for pharmaceutical packaging contain calcium and zinc stearates, which are PVC heat stabilizers. It was found in the literature that these additives can migrate to some aqueous solutions, especially when the pH is alkaline, the best example being sodium bicarbonate solutions. So, the aim of this work was to demonstrate the correlation between the lubricant ability of these stearates and their further migration in fluids. For this purpose, we studied the migration of calcium and zinc stearates during an extrusion step, focusing essentially on slip phenomenon. We have demonstrated here that slip phenomenon occurs in the case of plasticized PVC heat stabilized by calcium and zinc stearates. The slip phenomenon amplitude increases with the total amount of stearates in the formulation and also when the extrusion temperature decreases. The analysis of a die insert through scanning electron microscopy coupled with an X-ray energy dispersive technique could allow us to see that the additive mainly responsible for the slip is calcium stearate. The analysis of the leachable components of the formulations migrating after steam sterilization in sodium bicarbonate solutions leads to conclude that zinc stearate also migrates to the metal surface of the die during extrusion, but in a lower extent than calcium stearate. So, a good correlation exists between the processing conditions, including essentially the stearate concentration and the extrusion temperature, and the migration of these additives from the extruded sample to aqueous solutions.

 

[805reeftank]

Glad to hear you are getting great results in the tank.

One thing that hasn’t been mentioned in the thread is the impact of water pressure on the effectiveness of a RODI system. I think Randy Holmes Farley may have posted a link to a study that showed decreased effect on Zinc at lower pressures.

It seems most manufacturers recommend pressures of 45 psi or higher. If your RODI doesn’t have a psi gauge, most municipal water departments will come out and test the water pressure to your home or apartment for free. In my locality, you don’t even need to be home, they test at the outside hose bib.

What an amazing resource Reef2Reef is. People at least trying to help people.

My pressure is 55 going into the unit.

 

[805reeftank]

Sure, here's one:

Loading…

onlinelibrary.wiley.com

Influence of processing conditions on the leaching of thermal stabilizers from plasticized polyvinyl chloride in the presence of water

Abstract
Plasticized PVC formulations for pharmaceutical packaging contain calcium and zinc stearates, which are PVC heat stabilizers. It was found in the literature that these additives can migrate to some aqueous solutions, especially when the pH is alkaline, the best example being sodium bicarbonate solutions. So, the aim of this work was to demonstrate the correlation between the lubricant ability of these stearates and their further migration in fluids. For this purpose, we studied the migration of calcium and zinc stearates during an extrusion step, focusing essentially on slip phenomenon. We have demonstrated here that slip phenomenon occurs in the case of plasticized PVC heat stabilized by calcium and zinc stearates. The slip phenomenon amplitude increases with the total amount of stearates in the formulation and also when the extrusion temperature decreases. The analysis of a die insert through scanning electron microscopy coupled with an X-ray energy dispersive technique could allow us to see that the additive mainly responsible for the slip is calcium stearate. The analysis of the leachable components of the formulations migrating after steam sterilization in sodium bicarbonate solutions leads to conclude that zinc stearate also migrates to the metal surface of the die during extrusion, but in a lower extent than calcium stearate. So, a good correlation exists between the processing conditions, including essentially the stearate concentration and the extrusion temperature, and the migration of these additives from the extruded sample to aqueous solutions.

Interesting my Ro unit does have a ph booster filter wonder if that’s causing the zinc to leach?

 

[Randy Holmes-Farley]

Interesting my Ro unit does have a ph booster filter wonder if that’s causing the zinc to leach?

Can you describe that in more detail?

 

[805reeftank]

Can you describe that in more detail?

It’s this unit with a dual di canister. My tds going into the di resin is 04 don’t know if that matters.