JBL Clearmec Plus Pad for CPe1500Set 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.