Aquatic Experts Felt Filter Socks, 2 pack, 4 inch ring style, 100 micron, 4" x 10.5"

Aquatic Experts makes these aquarium filter media socks from dense polyester felt, and each one carries a 100 micron rating. You get two of them, and the 4 inch ring style means each sock has a smooth molded plastic ring at the top. A sock measures 4" x 10.5". Saltwater and freshwater sumps both work, and suspended particles get caught by the interlocking micro denier fibers.

What the 2 pack of felt filter socks contains

Two ring style socks arrive in each order, and the two units are identical in size and rating. The ring is molded plastic with a smooth finish, and the felt body runs 10.5 in below it on a 4 in ring.

• Two felt filter socks with molded plastic rings
• 100 micron felt on each sock
• 4" x 10.5" per sock

Cleaning and reusing the socks

The socks are reusable and can be cleaned multiple times. Heavy duty felt is used so the material maintains its shape through repeated cleanings, which keeps the ring style socks sitting in their holders between uses.

How the felt and the ring work in a sump

The dense polyester felt holds back fine particles, including uneaten food, fish waste, detritus and debris. Interlocking micro denier fibers within the felt trap particles that are suspended in the water passing through.

The molded plastic ring keeps the sock open at the top, and that ring is what seats the sock in a filter cup or holder. The 4 in ring and 10.5 in length are the two numbers to match against your sump setup.

Will these fit your filter cup or holder?

Aquariums with saltwater or freshwater can use these socks. They drop into the filter cups and holders that most sump systems use, so measure the ring diameter of your own cup or holder against the 4 in ring and the depth available against the 10.5 in length.

Red Sea filter trays are not compatible with these socks, so a Red Sea tray setup is not the right match. If your sump takes a different filter sock mount, confirm the 4 in ring size before ordering.

Questions about the 100 micron felt filter socks

How many filter socks come in one order?

The pack contains two felt filter socks, both 4" x 10.5" with a 100 micron rating.

What micron rating do these socks have?

The felt is rated at 100 micron, and the fibers that do the trapping are interlocking micro denier fibers.

Can these socks be used in a saltwater tank?

Yes. The manufacturer lists them for both saltwater and freshwater aquariums.

Can the socks be washed and used again?

They are reusable and can be cleaned multiple times, and the heavy duty felt maintains its shape through those cleanings.

Do these socks fit Red Sea filter trays?

No. Red Sea filter trays will not work with these socks; filter cups and holders used by most sump systems do fit them.