BRS 7 Stage RODI Questions

[AdamR0331]

So I live in South Florida and my city treats with chloramine , levels from 2.6-3.0 , and my TDS out of Sink is 130-140 , Will a BRS 6 stage be plenty?
1 sediment
2 Carbon blocks
2 Di resin
1 Membrane
Saw someone say they run a 6+4 which is overkill in my opinion as long as I stay ontop of my carbon blocks I should be fine??? as long as I dont let Di deplete

 

[Bigfishy1]

Yes, that will be plenty for providing good quality water.

 

[Fish Fan]

I'm not an expert with RODI filterers, but it's not so much how many stages you have, but what each stage does. If you have Chloramines, I believe you want a Chloramine specific carbon block or two.

Here's some info from BRS:
https://www.bulkreefsupply.com/cont...rg16UpBDhmA1_DM0Ym37e6M_iL5xERzxHtrKEV4y0W0yS
There can be a benefit to running two DI stages in series, it uses the media more efficiently. saving money on replacement media.

@Buckeye Hydro may be able to help you more.

Good luck!

 

[DJF]

Yes. Everything before the RO membrane is to extend its health and lower the amount of the DI used. What’s nice about 2 DI containers is you can let the first one completely deplete before putting the 2nd one in the first spot and a fresh one on the end. With one DI container, it’s best to change it before it’s fully depleted.

 

[Randy Holmes-Farley Verified Community Expert]

I’d use it and if the chloramine concerns you, measure total chlorine in the effluent. If any concerning amount is there, you can always get a special chloramine block for the carbon block.

 

[Randy Holmes-Farley Verified Community Expert]

I use a simple ro buddy and my water company uses chloramine. I’ve yet to detect any in the effluent.

 

[Fish Fan]

I use a simple ro buddy and my water company uses chloramine. I’ve yet to detect any in the effluent.

Isn't it possible that chlorine is making it's way to the DI stage, where it is being removed, but at the same time depleting the DI media much faster than if the chloramine/chlorine was removed by a specialized carbon block?

Would it be better to test for chlorine after the RO and before the DI stage(s), or by testing the water coming out of the waste line?

Thank you for your help!

 

[Randy Holmes-Farley Verified Community Expert]

Isn't it possible that chlorine is making it's way to the DI stage, where it is being removed, but at the same time depleting the DI media much faster than if the chloramine/chlorine was removed by a specialized carbon block?

Would it be better to test for chlorine after the RO and before the DI stage(s), or by testing the water coming out of the waste line?

Thank you for your help!

If that were the case, the membrane damage is more of a concern than Di depletion, IMO, but I have not seen that happen on previous systems I used where two membranes lasted more than 10 years each.

I might test the waste line some time. That’s a good idea. I have some good low level total chlorine test strips.

 

[Fish Fan]

If that were the case, the membrane damage is more of a concern than Di depletion, IMO, but I have not seen that happen on previous systems I used where two membranes lasted more than 10 years each.

I might test the waste line some time. That’s a good idea. I have some good low level total chlorine test strips.

Thank you for your help and reply!