Poly-Bio Marine Poly Filter Pad, 4"x8" is a highly absorbent pad will quickly and efficiently remove impurities and medications from aquarium water. Also removes phosphates which contribute to unwanted microalgae. Changes color when exhausted.
Features:
- This is a highly absorbent, quick acting saltwater filter pad
- Efficiently removes impurities, phosphates & medications
- This pad is designed to change color when it is exhausted
