Fiji Cube

Double 4" Diameter Quiet Filter Sock Holder - 2nd Gen

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$84.99 $99.99

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Upgrade your sump filtration system effortlessly

  • Easy-to-install design
  • Compatible with both filter socks and filter floss
  • Polycarbonate lid to prevent splashes
  • Enhances your mechanical filtration
  • Reduces ammonia-producing organic material in your aquarium
  • Prevents larger objects from clogging and damaging pump motors
  • Double 4" filter sock opening (filter socks included)
  • Quiet operation
  • Suitable for acrylic or glass sumps


Instantly increase your sump's filtration capacity by adding this easy-to-install Filter Sock Holder by Fiji Cube. Designed to reduce noise and increase mechanical filtration, water passes from your aquarium drain into the filter holder compartment, where it then flows through either dual filter socks (included) or filter floss (sold separately) to remove ammonia-producing organic wastes. Adding this mechanical filtration step is crucial for protecting your pump motors from becoming damaged by sand, crabs, and snails that may make their way from your aquarium into your sump system.



Dimensions - 14.7"L x 6.18"W x 7.64"H

Max. Tank Thickness - 1.5"

Filter Sock Openings - 4 inches


What's Included?

1x Double 4" Diameter Filter Sock Holder

2x 4" Filter Socks

1x Filter Floss Plate

More Information
UPC 735263725048
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Product Questions

My tank is 11.25 wide will this fit in my tank. I’m looking to save length for other stuff what is the overall lengths of the the sock holder length wise without the brackets? Thanks
Question by: Matt on Oct 9, 2023, 3:59 AM
Hey there,
Thank you for reaching out to us. Here are the specs on that filter sock. Please let me know if you need anything further.
Dimensions - 14.7"L x 6.18"W x 7.64"H

Max. Tank Thickness - 1.5"

Filter Sock Openings - 4 inches.
Answer by: Thomas Wofle (BRS Staff) on Oct 25, 2023, 11:31 AM
What length filter socks comes with this?
Question by: David Kasper on Jan 26, 2023, 11:45 AM
This comes with 2x 4"x8" Filter Socks.
Answer by: Ash (BRS Staff) on Feb 1, 2023, 9:34 AM
Will two 1-1/4” drain pipes fit into the opening where the drain pipes should go?
Question by: Eric Vogel on Jan 8, 2023, 8:41 PM
You would need to take into account the total area that the drain pipes take up; The width of that compartment is 6.14"
Answer by: Trista Briese (BRS Staff) on Jan 12, 2023, 3:56 PM
Will this fit the rim of an Aqueon 20g long?
Question by: Christopher Chaples on Nov 8, 2022, 9:45 AM
Thanks for reaching out to us! Assuming the rim is less than 1.5" thick this should mount on the tank without issue. Please let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Nov 10, 2022, 10:01 AM