Aquaforest Carbon 5000ml Marine Lighting this indicates the treatment is

this indicates the treatment is working

With Kessil Logic

Bio-Tet is a broad spectrum antibiotic for treatment of infectious diseases in marine and freshwater aquaria

Dimensions 4" x 2

And without trapped aquarium water inside the scraper it will never develop odors from growing bacteria

Aquaforest Carbon 5000ml Marine Lighting this indicates the treatment isHigh quality granulated active carbon. Eliminates undesirable chemical compounds in marine and freshwater aquariums. Carbon should be placed in flow filters in 100 ml for 100 l (27 US gal.) of water in marine aquarium or 200 l (54 US gal.)in freshwater aquarium. The insert should be replaced every 4 weeks.