The Red Sea Filter Media Cup can be packed with any type of media you wish including carbon, filter floss, ceramic media, and more. With a slotted lower half, water is forced to flow through your media before entering your aquarium.
This Filter Media Cup is an easy-to-clean alternative to filter socks and is made suitable for all Red Sea REEFER™ & MAX® systems. It can hold 1 liter of filter media with optimal water flow. Product includes filter media cup (4'' D x 8'' H) and one media bag (5" x 10").