A filter sock's job is simple - catch floating debris before water returns to the display - but getting the size right for your sump compartment and flow rate matters more than it might seem. Precision Marine offers two sizes to match different setups.
Why Mechanical Filtration Still Matters
Even a tank with strong biological filtration benefits from catching fine particulate before it breaks down and adds to the bioload. A filter sock is one of the simplest, most effective ways to do that, and a properly sized one keeps water genuinely clear rather than just circulating debris.
Choosing a Size
- Small Filter Sock - sized for smaller sump compartments and lower flow rates, catching floating debris and particulate before water returns to the display.
- Large Filter Sock - sized for larger sump compartments and higher flow rates, keeping pace without overflowing or bypassing filtration.
Setup Tips
- Match sock size to your sump's filter sock holder and your return pump's flow rate - an undersized sock at high flow can overflow before catching debris.
- Rinse and rotate socks regularly rather than letting one clog fully, since a clogged sock restricts flow and can bypass filtration entirely.
- Keep spares on hand so you always have a clean sock ready when swapping.
Precision Marine Filter Socks are available at Marine Concept Supply in both sizes - order online or pick up at our shop in Wheeling, IL. Shop the Small Filter Sock or Large Filter Sock, and browse more aquarium filtration.
