1 year ICP results ALL FOR REEF

[Randy Holmes-Farley]

Where is the calcite in relation to the other filters in a normal ro/di?

 

[805reeftank]

Where is the calcite in relation to the other filters in a normal ro/di?

It’s set up like in the picture I can’t remember if it’s before or after the membrane. I think it feeds into the holding tank and there’s a t valve to the DI canister.

 

[Randy Holmes-Farley]

It’s set up like in the picture I can’t remember if it’s before or after the membrane. I think it feeds into the holding tank and there’s a t valve to the DI canister.

If it is before the di, I can’t see it being a source unless particulates are released.

 

[805reeftank]

If it is before the di, I can’t see it being a source unless particulates are released.

I’m 100% sure it’s before the di. The di output line goes straight into my water jugs.

 

[eggie]

I’m 100% sure it’s before the di. The di output line goes straight into my water jugs.

Did you arrange to setup that RO Unit from factory ? Because that unit is not made for reef tanks but for house and human use
Also do you have only one DI resin stage ?

 

[805reeftank]

Did you arrange to setup that RO Unit from factory ? Because that unit is not made for reef tanks but for house and human use
Also do you have only one DI resin stage ?

Only thing that different from “reef” unit is then post carbon filter and ph booster. It’s a sediment filter 2 carbon blocks, and membrane don’t see why it would work the same I just added the 2 stage canister.

 

[eggie]

Only thing that different from “reef” unit is then post carbon filter and ph booster. It’s a sediment filter 2 carbon blocks, and membrane don’t see why it would work the same I just added the 2 stage canister.

So you have two Di Resin after your Membrane. Right ?

 

[805reeftank]

So you have two Di Resin after your Membrane. Right ?

Correct. 04 tds going in 00 coming out

 

[cilyjr]

Only thing that different from “reef” unit is then post carbon filter and ph booster. It’s a sediment filter 2 carbon blocks, and membrane don’t see why it would work the same I just added the 2 stage canister.

This is correct, We install tons of RO units for people's drinking water. A reverse osmosis membrane is a reverse osmosis membrane.

A bare Bones unit will have a sediment, two carbon and an RO membrane. What happens after that is what makes it fancy.

 

[eggie]

This is correct, We install tons of RO units for people's drinking water. A reverse osmosis membrane is a reverse osmosis membrane.

A bare Bones unit will have a sediment, two carbon and an RO membrane. What happens after that is what makes it

Correct. 04 tds going in 00 coming out

oh ok yeah I thought you didn’t have the DI stages besides the Ro Unit. I would just see what your next ICP reads for your water with the BRS Di if it didn’t change I would just get better DI like Spectrapure Max Cap and SilicaBuster

 

[allenk4]

Sure, here's one:

https://onlinelibrary.wiley.com/doi/abs/10.1002/%28SICI%291097-4628%2819981219%2970%3A12%3C2391%3A%3AAID-APP11%3E3.0.CO%3B2-P

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.

Thank you for the information.

Looks like that information is for “pharmaceutical packaging”. How do we draw a correlation between Pharma packaging and PVC Pipe that is designed specifically to transit water and a version designed for packaging pharmaceuticals. Seems like a stretch. I am not a chemist.

K

 

[allenk4]

My pressure is 55 going into the unit.

Sounds like low pressure is Not an issue, cross that one off the list.

 

[allenk4]

I do find it interesting that the suggested level for Zinc is 1.77 in your ICP.

What I have read over the last couple of days suggests 2 – 5 µg/L.

Zinc in marine aquarium and its importance - Reef Pedia

Zinc is an important and essential trace element influencing lot of physiological processes in marine aquariums. Find out more about it

reefpedia.org

 

[Randy Holmes-Farley]

Thank you for the information.

Looks like that information is for “pharmaceutical packaging”. How do we draw a correlation between Pharma packaging and PVC Pipe that is designed specifically to transit water and a version designed for packaging pharmaceuticals. Seems like a stretch. I am not a chemist.

K

I suggested as a simple hypothesis of where the zinc MAY have come from. I do not claim it’s the source, only a possibility.

After I suggest it, folks say no, there’s no zinc in plastic. I show otherwise, then they say there no evidence of zinc leaching, and I show otherwise, from pvc in a water solution nearly matching seawate in what the scientists publishing the study call the critical parameter of pH.

Now you want me to show evidence that in the specific brand of pvc used in this tank that zinc is leaching?

if you want to prove my hypothesis isn’t a possibility, how about showing any info at all suggesting plastic is not the source of the zinc?

 

[Randy Holmes-Farley]

I do find it interesting that the suggested level for Zinc is 1.77 in your ICP.

What I have read over the last couple of days suggests 2 – 5 µg/L.

Zinc in marine aquarium and its importance - Reef Pedia

Zinc is an important and essential trace element influencing lot of physiological processes in marine aquariums. Find out more about it

reefpedia.org

Icp company targets and ranges rarely if ever show justification of those targets.

 

[805reeftank]

Icp company targets and ranges rarely if ever show justification of those targets.

at what range would you take action? If at any point?

 

[allenk4]

I suggested as a simple hypothesis of where the zinc MAY have come from. I do not claim it’s the source, only a possibility.

After I suggest it, folks say no, there’s no zinc in plastic. I show otherwise, then they say there no evidence of zinc leaching, and I show otherwise, from pvc in a water solution nearly matching seawate in what the scientists publishing the study call the critical parameter of pH.

Now you want me to show evidence that in the specific brand of pvc used in this tank that zinc is leaching?

if you want to prove my hypothesis isn’t a possibility, how about showing any info at all suggesting plastic is not the source of the zinc?

Seems like we are off-track.

- The OP was trying to track down the source of excess Zinc in water coming out of his RODI

- Someone suggested that Zinc leeches out of PVC….which would, in this case be the parts and pieces of the OP’s RODI system

- I linked to information that explains PVC pipe used for carrying water, does NOT leach Zinc into the water it caries

- Someone else posted a study on Pharmaceutical Packaging leaching Zinc


Seems like a settled matter.

Glad the concerns of the OP have been calmed.

 

[twiatr2001]

Salinity low

 

[allenk4]

Out of curiosity, I wonder how the ICP result would be affected by misstating the system volume when submitting the sample?

These instructions seem to indicate that it’s a factor in obtains an accurate result.

Pobranie wody do ICP-OES - jak to zrobić? - Reef Pedia

Prawidłowe pobranie wody do badania ICP-OES jest niezwykle ważne, ponieważ wpływa na dokładność wyników tego badania.

reefpedia.org

 

[805reeftank]

Out of curiosity, I wonder how the ICP result would be affected by misstating the system volume when submitting the sample?

These instructions seem to indicate that it’s a factor in obtains an accurate result.

Pobranie wody do ICP-OES - jak to zrobić? - Reef Pedia

Prawidłowe pobranie wody do badania ICP-OES jest niezwykle ważne, ponieważ wpływa na dokładność wyników tego badania.

reefpedia.org

Well my display is 50 gals my sump is 20. The sump is half full so 60 gals, minus displacement of rocks and pumps I’d say it’s 50 gals of water. That’s what I put as system volume.