4" filter media cups include a free high quality filter media bag, as used in Red Sea Reef-Spec Carbon. Cup Dimensions: 4.25 x 4.25 x 8.5"

7" Filter Media Cup Our 7" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid one piece design, that holds any filter media. The round design allows the...

4" Filter Media Cup Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid one piece design, that holds any filter media. The round design allows the...

Two 7" Filter Media Cups Our 7" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid one piece design, that holds any filter media. The round design...

The IceCap 4in Media Cup can hold just about any type of filtration media, from filter floss, ceramic media, carbon or GFO. Just put the Media Cup in place of your 4" filter sock and fill it with your favorite filter media. High-flow slots are cut at the...

4" Filter Media Cup Kit Includes: 2x - 4" Clear filter media cup, 1x - Box of SERA filter media. Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a...

4" Filter Media Cup Kit Includes: 2x - 4" Clear filter media cup, 1x - Box of SERA filter media. Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a...

4" Filter Media Cup Kit Includes: 1x 4" Clear filter media cup, 1x Box of SERA filter media. Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid...

4" Filter Media Cup w/ Two Red Sea Mesh Media Bags Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid one piece design, that holds any filter...

4" Filter Media Cup Kit Includes: 1x 4" Clear filter media cup, 1x Box of SERA filter media. Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid...

4" Filter Media Cup w/ Two Red Sea Mesh Media Bags Our 4" Filter Media Cup will replace all those filter socks you have hanging around. Made out of a BPA free Polypropylene, this 4" Filter Media Cup is a solid one piece design, that holds any filter...