rikka “Carbon Active” is high-quality granulated activated carbon for cleaning aquarium water. It removes coloured impurities, including those left by medicines.It can be used for both short-term and continuous water purification.The carbon always has a neutral pH, so it is suitable for marine and freshwater aquariums.Place the carbon in the filter in mesh bags made of biologically inert material, at 1-2 g per litre of water.Before use, it is advisable to pour boiling water over the carbon to activate it.How often to replace it depends on how dirty the water is, the number of fish, the frequency of water changes, etc. Usually every 1-2 weeks.• Do not swallow.• Keep out of reach of children!DIRECTIONS:Place the carbon in the filter in 20 g bags. Dosage: 1-2 g of carbon per 1 l. Replace after 1-2 weeks.Composition: purified activated carbon.Shelf life: unlimited. Store in the original packaging at 10-25°C in a dry, dark place.Weight: 200 g ±5%.Contents: 10 bags. Bag size (L:W:H): 10:8:1 cm.Manufactured in accordance with TU U 20.5-3348315741-001:2015.