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CPR Sock-It-Simple Filter Sock Holder - Small (4 inch)


Item #: CR5112

In Stock

The Sock-It-Simple lives up to its name and will easily add a filter sock to most any sump (with a vertical rim only), increasing your mechanical filtration power.

  • Tinted body and adjustable bracket height
  • Fits onto vertical rims less than 1.25" thick
  • Fits 4" diameter filter socks
  • Dimensions (L x W x H): 4.75" x 4.75" x 2.375"

Note: Filter socks sold seperately.

Manufacturer information

CPR Aquatic Aquarium Supplies
In Arcata, located in Northern California, the sea is a way of life. From the advanced Marine Biology department at Humboldt State University, just up the hill from CPR’s headquarters, to Humboldt Bay, about a mile west, CPR is nestled in a perfect environment to develop equipment for marine aquariums. CPR was started in a small garage in 1987 to produce biological filters for local aquarists. People who used CPR filters were impressed by the high quality and affordable prices. Word spread and the company grew. Since then, CPR has expanded to a 10,000 sq. ft. production facility and has developed many innovative products over the years. CPR is incorporating new ideas and technologies all the time. Their goal is to allow aquarists to place the highest performing products in their tanks at reasonable prices.

3 Stars


Reviewed on
February 27, 2021

No, I would not recommend this.

Poor sock holder

Pros: Vary Adjustable, Lots of optional hardware to help make it fit

Cons: Does not firmly hold on to any of the filter socks that I have tried.

I bought two. The holes where you insert the filter socks vary in diameter and do not hold the filters in firmly. As a result the filters fall into the sump literally dumping crap in the water.

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Reviewed on
July 18, 2020

Yes, I would recommend this.

As expected

Fast shipping and product was exactly as advertised.

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