Purchase this item and get 
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.
