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Chloramine MONSTER - San Jose Poll

Are you using a Chloramine Monster before your rodi?


  • Total voters
    4
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Supporting Member
Joined
Aug 22, 2013
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2,464
check with your local water company on this-chances are they are using chloramine/chlorine but then again with a tds of 400+ plus supposedly I wonder if they filter the water at all?!

In the east bay they do use chloramine and when I used to make my own water -I had a chloramine block in the second stage (sediment filter was first). I didn’t make RODI though as the TDS was 30 at the time.
 
Supporting Member
Joined
Jul 26, 2025
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394
check with your local water company on this-chances are they are using chloramine/chlorine
SJ water does use chloramine, that information is public and they do call out that it may have an impact on live fish or aquatic animals:

 
Supporting Member
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Aug 22, 2013
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2,464
SJ water does use chloramine, that information is public and they do call out that it may have an impact on live fish or aquatic animals:

Looks like they were doing a combo chlorine and chloramine mix before but now going all in on chloramine. Either way you def need a filter before it hits the RODI membrane -I believe it can damage it permanently..
 
Supporting Member
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May 29, 2020
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928
Is it significant enough to get a $300 carbon filter?? All my RODI icp tests come back zeros across the board. Latest one was last month and membrane is 2 years old.
 
Supporting Member
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May 29, 2020
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Whats the difference between the chorimine monster that I can’t just run a standard carbon block before the rodi. It says contact time, but doesnt a dual stage reactor provide the same benefit?
 
Supporting Member
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Mar 4, 2021
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3,460
Is it significant enough to get a $300 carbon filter?? All my RODI icp tests come back zeros across the board. Latest one was last month and membrane is 2 years old.
Probably not.

I run the chloramine block then the carbon block because brs said it was better if chloramine was in the water and it is in most places now.

What is making you question this now? I only would if everyone in a huge area all of a sudden lost a bunch of stuff. Also, couldn't you just add some Prime freshwater chloramine buster and let it sit a day, then it breaks down into chlorine and ammonia and evaporates, or according to the website bonds with other stuff and is easier to deal with from the biological filter.
 
Supporting Member
Joined
Jun 11, 2006
Messages
969
In Livermore. I run the Monster. Is it worth $300? I don't know. Do I burn through less DI resins and membranes since? Maybe. I should have paid closer attention and taken notes. It makes me feel good having it but I can't tell if it had a positive effect on my reef. I was hoping it would save me more money on membrane and resin over the long term (taking notes could have answered this for me). I plan to make water for a long time.
 
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May 29, 2020
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We had this lengthy thread about this topic, which might be worth re-reading again if you have not: https://bareefers.org/forum/threads/challenges-in-removing-chloramine-in-rodi-setup.39238/

Re ICP: Can share your most recent RODI water test results which show that your water has 0 chloramine?
Icp cant show chloramine. Only the elements, but if I have zero Cl then I can’t have any Clhoramine.

Regardless I tested the water after the carbon blocks and all chloramine is removed from them.
 
Supporting Member
Joined
Jan 15, 2023
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3,092
Icp cant show chloramine. Only the elements, but if I have zero Cl then I can’t have any Clhoramine.
Yes, hence my question :). Which test/brand is measuring CI for RODI?

Regardless I tested the water after the carbon blocks and all chloramine is removed from them.
How did you test for chloramine?
 
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