Set with nitrite, nitrate and phosphate eliminator for CristalProfi e.Key Features:• Clean and healthy water: set with nitrite, nitrate and phosphate eliminator for CristalProfi e.• To use: insert the complete set into the empty filter basket, remove the plastic bag, place in the filter.• Pollutant eliminator: crystal-clear water without algae problems.• Mix of clay balls and special resin, slow flow through foam edge.