The Penn Plax Phosphate Remover Infused Filter Media Pad is an adaptable filtration solution for ALL filter types. Just cut it to fit your needs! This infused pad reduces the phosphate level to safe levels. Phosphates are food for algae, and if left untreated can cause nuisance algae and severe algae outbreaks. Its advanced filtering technology improves the water quality of your aquarium or pond.
Directions: Rinse thoroughly with cold water before placing in filter. For best results, replace every 4-6 weeks.