Set with foam insert and actived filter carbon for CristalProfi e.Key Features:• Clean and healthy water: set with foam insert and phosphate-free activated coal for CristalProfi e, to remove medication residue, discolouration and high molecular organic impurities.• To use: Transfer the complete set into the empty filter basket; remove the plastic bag, place in the filter.• Replacement after 3 weeks.• No release of algae promoting phosphate into the water.