BRS Felt Filter Sock with Plastic Ring

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  • Using Filter Socks in Your Reef Tank - EP 4: Saltwater Aquarium Maintenance

Quick Overview

Why does BRS recommend this?


Felt filter socks give the best qualities of trapping free floating debris to give your tanks water that crystal clear appearance.  Felt filter socks with the plastic rings make replacement quick and easy, and most sumps will readily accept the BRS felt filter sock.  In most cases we will always put felt filter socks in our sumps.


Filter Socks are used on overflows to remove small floating particles from aquarium water. This can dramatically improve water quality and reduce maintenance on filters that would otherwise become clogged.


Felt Filter Sock is better at removing particles than mesh but can clog faster. Plastic ring fits common sump holders.


200 Micron Filter sock

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  • Quick Overview

Why does BRS recommend this?

Felt filter socks give the best qualities of trapping free floating debris to give your tanks water that crystal clear appearance.  Felt filter socks with the plastic rings make replacement quick and easy, and most sumps will readily accept the BRS felt filter sock.  In most cases we will always put felt filter socks in our sumps.

Filter Socks are used on overflows to remove small floating particles from aquarium water. This can dramatically improve water quality and reduce maintenance on filters that would otherwise become clogged.

Felt Filter Sock is better at removing particles than mesh but can clog faster. Plastic ring fits common sump holders.

200 Micron Filter sock

BRS Felt Filter Sock with Plastic Ring

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BRS Felt Filter Sock with Plastic Ring 4” x 8”
SKU: 205905
$5.99
 
 
BRS Felt Filter Sock with Plastic Ring 4” x 14”
SKU: 205901
$6.99
 
 
BRS Felt Filter Sock with Plastic Ring 7” x 16”
SKU: 205903
$7.99
 

Availability: In stock

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Product Questions

What is the micron rating for these socks? Thanks
Question by: David on Sep 4, 2013 8:35:00 AM
Hey David,
Good question. All of our filter socks are 200 micron filter socks!
Answer by: Bulk Reef Supply on Sep 4, 2013 8:35:00 AM
I use the felt sock with the plastic ring and would like to know how people clean them.
Question by: Ken on Jun 3, 2014 7:03:00 PM
Hey Ken,
Some folks just throw them in the washing machine when they collect enough dirty ones. Personally I turn them inside out and give them a good rinse and scrub by hand.
Answer by: Bulk Reef Supply on Jun 3, 2014 7:03:00 PM
I'm looking for a filter sock for my aqueon sump
Question by: Hank on Jan 26, 2014 10:06:00 AM
Hi Hank,
This will be the 4x14 models with the plastic rings :-)
Answer by: Bulk Reef Supply on Jan 26, 2014 10:06:00 AM
I have ordered about 6 of these for my sump they work great except they never seem to completely seal in the opening.
Is there any O ring I can use or, can I put a heavy rock in the bottom of the sock to hold them tighter to the opening?
Question by: John Howe on Jan 21, 2017 10:13:00 AM
Hey there, great question! Unfortunately there is not an o-ring or seal available specifically for that problem, but you have a great solution in weighing it down with a rock. I've actually done the same with one of my old systems! :-)
Answer by: Randy (Admin) on Jan 25, 2017 3:39:00 PM
Are these polypropylene or polyester?
Question by: Kevin Vinal on Nov 24, 2016 5:50:00 PM
Great question! The rings are polypropylene and the socks are felt. :-)
Answer by: Randy (Admin) on Nov 25, 2016 7:30:00 AM
I have a synergy reef systems sump. The exact same type as the one you guys have on the BRS160 video series. Just wondering what size you would recommend. I was thinking the 4x8
Question by: Alex on Apr 27, 2016 4:58:00 PM
Great question!
The 4x 8 will work great additionally we have used the 4x14's as well which allow for a little more time before changing.
Answer by: Connor (Admin) on Apr 27, 2016 5:29:00 PM
Would the 4" be compatible as replacements for the socks that come with the CADLights SAIO series?
Question by: Lauren on Mar 7, 2016 7:53:00 AM
Great question,
We are not familiar with the CAD lights sock size. As long as the hole for the filter socks is 4" exactly our filter socks will work great! Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 9, 2016 6:25:00 PM
I recently bought the Trigger Systems Emerald 34 Sump and it came with the 4 x 14 felt filter socks which seem to be a bit long. When I did purchase the sump I ordered the two 4 X 8 felt filter socks and I think these fit much better. I just measured the sump and from bottom to the plastic ring is about 11 inches on these sumps. I might of course answered my own question about which length would be better. Per your advice on the video I will be buying more of the 4 X 8 felt socks so that I can be a better fish father and keep my tank cleaner. ;-)
Question by: jeffrey castor on Jan 25, 2017 6:06:00 AM
Great question! If only they came in a 10" length! :-) I have the same problem with my Trigger sump, but I've opted for multiple 4"x8" socks and swap them more frequently. :-)
Answer by: Randy (Admin) on Jan 28, 2017 10:21:00 AM
What is the inside diameter of the plastic ring for each of the sock sizes?
Question by: Mark Brown on Jan 18, 2016 8:37:00 PM
Great question!
These filter socks have a lip which makes the inside diameter not very important for measurement. These will fit inside of a 4" diameter hole perfectly however! Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jan 26, 2016 7:36:00 PM
I have a Precision Marine Sump 48 Pro which is labeled to have 7" holes for the Filter socks. Does that mean I purchase the 7" x 14" socks?
Question by: Jason Randall on May 5, 2016 9:05:00 AM
No answers yet. Be the first to answer the question!
Will these work in the Emerald 34 sump?
Question by: Diane Gergely on May 13, 2017 12:39:00 PM
Hey there,
The BRS filter socks with plastic rings work great in the Trigger sumps. Many of us here at the office use them for just that!

Happy reefing!
Answer by: Zack (Admin) on May 15, 2017 4:20:00 PM
Hello would this fit the reefer 250? Tried other 4 inch ring but no luck so far.
Question by: Carlos on Feb 4, 2016 12:29:00 PM
Great question!
This will not work in the red sea reefer tanks unfortunately. The only socks we are aware of the if the socks directly from Red Sea. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 4, 2016 3:08:00 PM
Is it acceptable/advisable to put bio-media in the socks such as Seachem Matrix or Brightwell Aquatics xPort Bio?
Question by: John Hildebrant on Jul 10, 2016 11:07:00 AM
Hi John,
You can put any type of media you choose into the filter socks, however for a media sock, we would suggest using the mesh socks over the felt, since little particles of media, like getting stuck in the felt socks and become a bit harder to clean over time. The mesh socks handle loose media much better while allowing for more flow through them. The felt socks are best for water polishing.
Answer by: Charlie (Admin) on Jul 11, 2016 11:19:00 AM
Hi,

I've been using the 8" socks with good results - their also very durable and machine wash well.

1) Is using bleach necessary when machine washing?

2) What's the best way to tell when these socks need to be replaced (because of age/wear and no longer effective)?

3) If I wait too long will that contribute to an increase in nitrates?

Thanks,
Larry

Question by: Larry on Jun 12, 2014 5:31:00 AM
Hi Larry,
1) It isn't necessary (many people just use straight water) but bleach does a very good job of breaking down organics.
2)If they have holes worn thru them or if the stitching starts to come apart would be when I would start to worry about them :-)
3)If you leave them in the tank to long it won't be as effective. It is more of an opportunity cost, by leaving the sock in for too long you give a chance for detritus to contribute to the nutrients in the tank, whereas if you had changed it out you would have removed it from the tank before giving it the opportunity. In the end, there won't be any more nitrates then could have existed without it, but you missed your chance to prevent them if you don't change them.
Answer by: Bulk Reef Supply on Jun 12, 2014 5:31:00 AM
What is the correct size for a aqueon #1 sump?
Question by: jason on Jun 13, 2014 3:51:00 AM
Hi Jason,
Either of the 4" filter socks will do the trick. I personally prefer to use the 14" even if its a bit long.
Answer by: Bulk Reef Supply on Jun 13, 2014 3:51:00 AM
How often do you normally recommend you change the filter socks? what is the best method to clean the socks? if soaking - in what solution?
Question by: Don on Nov 19, 2013 5:11:00 AM
Hey Don,
The more often you change them the better, that way you can remove the solids before they continue to break down and add additional nutrients to your water column. You want to avoid soaps when cleaning them but its pretty common for people to use unscented household bleach in water. Be sure to rinse them and all them to dry completely.
Answer by: Bulk Reef Supply on Nov 19, 2013 5:11:00 AM

Full Details

Filter socks come in mesh or felt and with a plastic ring or draw string. See below for differences and unique advantages.


  • Mesh: Thin, doesn't clog as easily as felt
  • Felt: Thicker, better at removing particles, but can clog faster
  • Plastic Ring: attaches via ring that fits common sump holders
  • Draw String: attaches directly to plumbing
  • BRS recommends starting with felt socks and switching to mesh if they clog faster than desired.

Filter sock benefits:


  • Regular use will result in crystal clear water most convenient form of mechanical filtration.
  • Remove excess food, detritus, organic waste, dust and other particulates
  • Convenient form of mechanical filtration
  • Prevents larger objects like sand, crabs and snails from damaging pump motors
  • Reduces ammonia and nitrate producing organic waste
  • Increases filter life

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Reviews

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  • best filter sock By ARMANDO on 6/7/2017

    I bought a few of these socks, construction is solid. Great to have around as mechanical filtration.
    love me. Traps a lot of waste.
  • Just what the Dr. ordered By statru on 5/21/2017

    The quality and size are perfect for my Crystal Systems sump. It's not easy finding the longer ones that reach the bottom of the sump. I've used the easily accessible shorter versions and they require more frequent maintenance. I struggle to turn them inside out prior to laundering, but manage to do it. Then I wash them in hot water and 1/2 cup bleach and air dry them. I have several and rotate them so I'm not using the same ones all the time. It helps to get more/longer use out of them. And the price can't be beat! Thanx BRS for the value! <*}}}><
  • Works Great By Gordon on 4/23/2017

    I have gotten 10 of these and they work great. The stitching stays together through every wash I have given them.
  • Great quality By Scott on 4/23/2017

    These socks are made of good materials and are put together very well. I will buy more. Just like everything else from BRS they are priced well and are excellent quality. Fast shipping and excellent customer service as usual
  • Great socks! By statru362 on 4/7/2017

    Love the ease of use and the quality of the fabric used in the sock's composition. The plastic ring around the neck fits perfectly in my Trigger Systems Crystal sump sock holder. I just wish the 4-inch wide ones were easier to turn inside out to better clean them. Once a week I swap them out and they get laundered in my washer in nothing but 1/2 cup of bleach, then I air dry them. They get nice & white again so I can't complain.
  • Great socks and work very well By Kirti on 3/30/2017

    These socks are extremely well made compared to some others I have tried. Not only do they do a great job but they last as well. They are easy to clean and come out nice and clean with a dilute solution of bleach and water
  • My Favorites By Evan on 3/15/2017

    I only started appreciating these socks when I switched to a sump that doesn't fit them. I especially like them after my monthly maintenance, when I like to stir up the sand bed and blow detritus out of the rocks. The tank water turns filthy, but overnight, these socks polish the water to sparkling clean. No mesh sock I've ever tried comes close.

    I miss you, trusty BRS felt filter socks...
  • Excellent By Yehuda on 3/8/2017

    good quality and price.
  • BRS Felt Filter Socks Work By Rick on 2/23/2017

    the BRS Filter sock with plastic ring do a great job of the start of the filter process in my sump
  • Great sock filters By Lou on 2/7/2017

    I bought 2 extra socks for my CPR SOCKIT 4” SOCK-it Filter Sock Holder which I bought here at BRS. These socks feel strong and sturdy and fit so well on my sock holder. I definitely recommend buying these. They are not too difficult to clean either. I just turn them inside out, wash them out with hot water and then throw them in a bucket full of bleach and hot water. Leave it in for a few hours and they are white once again, like new.
  • Trigger Systems Emerald Sumps By jeffrey on 1/25/2017

    I ordered a couple of extra felt socks when I purchased the Trigger Systems Emerald 34 Sump. The sump came supplied with 4 X 14 felt socks which to me seem to long. The socks seems very well built and I will have to wait and see what happens over time. I will be getting more of the 4 X 8 Felt socks so that I can be better at cleaning them out regularly.
  • HEY NICE SOCKS By CJ on 1/17/2017

    Great filter socks.