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RO/DI question
- Thread starter horseplay
- Start date
@iTcJu has it.....both chlorine and/or chloramine are not detected by TDS. Just make sure you have a carbon block specific to chloramine.
I checked the three water systems serving Elizabeth, NJ. 2 uses chloramines with max of 3.8 and 3.2 ppm. The other uses chlorine.
So it is likely that there is chloramines in my ro/di water.
Hallowhead
NJRC Member
Can't you also get an ICP test
My TDS meter (handheld) can only detect down to 1. That's when I change the resin. It kinds of corresponding to the color of the resin which becomes yellow. It's not like it's an emergency but definitely time to change.
This is not practical for testing RODI water.
Here's a link for this from Randy Holmes-Farley if anyone is still interested.
The summary:
I will be buying the basic BRS 4 stage and buy appropriate filter catridge for it.
The summary:
1. | Most RO/DI systems seem capable of removing chloramine adequately for aquarists. |
2. | The carbon cartridge may become less useful over time, and it is possible that the chloramine removal effectiveness of a system may be lost before the DI appears to need changing. |
3. | Cheap sediment cartridges may expose the carbon cartridge to unnecessary fouling, which may permit chloramine to pass through the system. Cartridges should be replaced as soon as the pressure drops significantly, even if RO/DI water is still being produced at a reasonable rate or purity as measured by total dissolved solids. |
4. | Testing for chlorine and chloramine is easy, so any concern is easily reconciled. |
5. | One Hach kit provides several dozen test results. Our local Boston Club bought some kits and had a "water testing day." The kits can also become part of the "library" of a local club for aquarists to use once in a while to see if their systems are functioning. That way, the cost to each aquarist is minimal. |
I will be buying the basic BRS 4 stage and buy appropriate filter catridge for it.
Hallowhead
NJRC Member
I'm not sure how ? You'd send the ro water as the main sample ?
My DI resin only last 2-3 months based on my water and usage. I change the DI resin when color changes. Then when that one changes...I replace the Sediment and 2 carbon filters. So I but the 6 stage kit, even though ai only have the 5 stage, so I get the extra pouch of DI resin. So $42 every six months or so. And I replaced my membrane June 2020...will replace again about June 2023.
That's the plan.
That's the plan.
Hallowhead
NJRC Member
I have started with ro buddie and have really just the membrane left at this point haha.
I made a typo so TDS is 1.
Thank you
At 1 I would change out my resin until I got zero