Replacement foam cartridge for Cristal Profi i40 and TekAir aquarium filters.

Main Features:
• Clear and healthy water: Replacement foam cartridge for CristalProfi i40 and TekAir aquarium filters - T-shaped circular cross-section.
• Usage: Add FilterStart. It can be used for TekAir and CristalProfi i40 filters.
• Foam with an ideal service life thanks to 25 pores per inch, providing effective mechanical and biological filtration.
• No harmful substances released: 100% water-neutral synthetic material.