Comes with TWO FREE bags of Inland Seas 6 oz Activated Carbon.

This package has two items: the OASE BioMaster 600 Canister Filter & OASE CrystalSkim 600 Skimmer. The CrystalSkim takes care of the one type of filtration canister filters are not good at—surface skimming. It effectively frees the aquarium surface of biofilm, floating plant debris and other substances. It eliminates any biofilm from the water's surface. Removing biofilm is important for proper oxygen flow in an aquarium. Designed to catch even the finest plant debris that are almost impossible to remove with a net.