Marineland Penguin Cartridge RS-A 6 pack

The poly-fiber pad mechanically filters water before it’s chemically filtered through the Black Diamond Premium Activated Carbon.
The patented ribbed backing creates an even distribution of activated carbon and maximum water-to-carbon contact for clearer water.
Double thick poly-fiber traps debris and waste particles and lasts for up to 2-4 weeks.
Slides easily into place making replacement fast, dry and effortless.
Compatible with Penguin 100B, Mini and 99B.