Bulk Reef Supply

BRS Universal Carbon Block Filter - 1 Micron

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$20.99 $20.99

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Why does BRS recommend this?

We spent a ton of time researching and testing to find the best carbon block available while still being reasonable when it comes to price.  There are other filters that work well however do not last as long. By simply just looking down the center of the carbon block you can see why the Universal Carbon blocks are superior to the competitors.  If you have a well, or city water the universal blocks will work for everyone in almost all reverse osmosis systems.


BRS Universal Carbon Blocks have been specially formulated for industry leading chloramine and chlorine reduction making it the highest performance and longest lasting carbon block in our industry. 

  • Chlorine 35,000 @ 1 GPM*
  • Chloramines 3,500 @ 0.5 GPM*
  • NSF Certified Materials


New: BRS Universal Carbon Blocks were developed to be the best industry solution for chloramines, chlorine and well water to help make filter selection easier for everyone. The new block represents the latest in carbon technology by increasing surface area, volume of carbon and catalytic sites within the carbons pore network. 


BRS Universal Carbon Blocks are manufactured using high performance catalytic active carbon combined with a new binder system technology which maximizes the availability of the critical catalytic sites. The combination of advanced carbon technology, increased volume of carbon contained in each filter and proprietary manufacturing processes delivers exceptionally high chloramine, chlorine, VOC and general chemical performance.

  • Compatible with all BRS systems as well as all competitor systems which use a standard 10” filter.
  • Specifically formulated for superior Chloramine reduction 1 µm (micron) Nominal Filtration*
  • Chlorine 35,000 @ 1 GPM**
  • Chloramines 3,500 @ 0.5 GPM***
  • High chemical adsorption
  • 30% more carbon than standard blocks****

*Nominal Micron rating for all above - 1 micron
**2ppm free chlorine >90% reduction
***3ppm monochloramine >85% reduction
****Manufacturer's internal test data

More Information
UPC 850000695085
Filter Dimensions 10 in. x 2.5 in. (Standard)
Carbon Block Type Chloramines/Universal
Micron Rating 1
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Product Questions

how does this filter stack up against the matrikx chloraguard ?
Question by: ED on Jan 30, 2023, 10:51 PM
Thanks for reaching out! In my opinion this is the best carbon block we sell affective against everything!
Answer by: James Johnson (BRS Staff) on Feb 16, 2023, 11:57 AM
Who makes them and where are they made?
Question by: Ed on Oct 21, 2017, 10:53 AM
Thanks for getting in touch with us. We are unable to offer contact information at the manufacturers request. Although, these blocks are produced in India.
Answer by: Tyler Schafer on Nov 7, 2017, 8:57 AM
i am currently using Catalytic Carbon in my stage 2 flilter, can i use these instead ? and i am using chlorplus 10 carbon block in stage 3.
Question by: Val Sammut on Jan 10, 2017, 4:55 PM
Great question! For chlorine and chloramine removal, we now include these BRS Universal Carbon Blocks with all of our filtration units. You can absolutely replace your existing carbon and carbon block with these and have equal, if not more effective, removal of those chlorines/chloramines! :-)
Answer by: Randy on Jan 11, 2017, 3:49 PM
Whats the difference between a 1 micron and 5 micron carbon block?
Question by: Aiden on May 28, 2016, 7:48 PM
Hey there!

Great question! The lower the micron the smaller the particulates it will capture. A 1 micron filter will capture smaller particulates than a 5 micron filter. :-)
Answer by: Randy on Jun 7, 2016, 9:29 AM
I am purchasing the BRS Universal Carbon Block Filter - 1 Micron, as stage 3 of a 4-filter home system. Stage 1 and 2 are sediment filters, this carbon filter, and a ceramic final filter. Does this BRS Universal Carbon Block Filter - 1 Micron remove fluoride from the water? If not do you have any filter that will remove fluoride?
Question by: Jan Gregg on May 19, 2016, 1:38 AM
Hey there! We sell the RO systems which include an RO membrane and appropriate housing. RO membranes are where the actual filtration occurs and removed up to 99% of all fluoride from the water. You will want an RO membrane to remove these elements.
Answer by: Connor on May 19, 2016, 3:43 PM
How can I tell that it's time to replace the carbon block? By my water pressure reducing or does it start to stain? Any other way to tell?
Question by: Joey Garcia on May 2, 2016, 11:03 PM
Great question!
With the pressure drop from where it typically is. This is the easiest way. You can also test the water coming out of the carbon block with a chlorine test strip to ensure it is removing the chlorine.
Answer by: Connor on May 3, 2016, 5:13 PM
How long do these last?
Question by: Michael DeNardo on Apr 15, 2016, 9:08 PM
replacing carbon blocks on rodi 6 stage should i use 2 of these or should i use one of these and a 5 micron carbon block?
Question by: Joshua Hansen on Apr 10, 2016, 10:06 PM
Great question!
We recommend two of the 1 micron universal carbon blocks for best coverage of chloramines in the water. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 14, 2016, 10:34 AM
Do you need to, or is it better to use catalytic carbon ahead of these blocks for chloramine reduction or are the good on their own? They are rated for 3500 gallons so if you run a dual set up does that double your block life to 7000 gallons?
Question by: Rick on Jan 24, 2016, 5:35 PM
Great question!
Overall for best chloramines coverage you will want to use two 1 micron Universal Carbon Blocks. We have created a video on this exact topic included below! Overall the extra carbon block will not double the life however will ensure the RO membrane has better protection and it will have a small increase on time spent. Feel free to let us know if you have any further questions!
Answer by: Connor on Feb 3, 2016, 11:53 AM
What is the length on these units? I have a 10" RO canister with 1/2" ports (purchased from BRS) I would like to use for this filter, will it fit properly?
Question by: Nick on Dec 21, 2015, 2:07 PM
Great question!
The Universal Carbon Block will fit all of our 10" canisters just fine. Most of our RO systems however use 1/4" ports which may be something to watch out for. Feel free to let us know if you have any further questions!
Answer by: Connor on Jan 6, 2016, 6:02 PM