The industry standard for a reason. The Royal Reef Supply 4-Inch filter sock is the perfect mechanical filtration upgrade for medium-sized marine, reef and freshwater sumps. Balancing high volume flow capacity with precision filtration, this sock catches particulate matter effortlessly to give your tank a polished, professional look.
Key Features
Optimal Micron Balance: The 2225-micron weave offers the sweet spot between ultimate water clarity and long lasting operation between cleanings.
Universal Standard Fit: Features a rigid 105mm diameter ring designed to fit perfectly into standard 4-Inch filter sock holders and sump baffles.
Pump and Equipment Protection: Acts as a reliable safeguard, stopping stray sand, small snails and coarse debris from entering your return pump chamber.
Washable and Reusable: Designed for the demanding hobbyist; easily rinses clean for repeated use, lowering your long term maintenance costs.
