GEX Sponge Mat(Black) - 1 piece / pack (For Slim HOB Filter) (GX024039)
-The Replacement Media of the GEX Slim filter.
-Suitable for the GEX filter S / M / L models.
-Can be used for sea water, fresh water and planted tank.
-The left replacement media is the Activated Carbon Replacement Cotton.
-The right replacement media is the bacteria cotton.