Aqueon Replacement Phosphate Remover Filter Pads Size 30/50 4 pack

The pads are pre-cut to fit in the Aqueon QuietFlow LED PRO Power Filter Bio-Media Grid. Phosphate Remover Pads help to remove excess phosphate that contribute to algae growth while trapping excess waste, food and other organic debris Pre-cut for easy installation For optimal performance, replace approximately every 2 to 3 weeks