Marina Filter Cartridge i25

Replacement media Marina i25 - Pack of 2 - Offers mechanical, biological and chemical filtration - The polyester foam traps fine debris; the charcoal removes pollutants and odors; and the zeolite eliminates toxic ammonia - Easy to replace - Designed to fit the internal filter Marina i25 (A131) The replacement cartridge Marina i25 is specially designed to fit inside the internal filter Marina i25. The outside of the cartridge features a polyester foam to trap fine particles; while the inner chambers contain charcoal to eliminate pollutants and odors; and zeolite to remove toxic ammonia, providing a cleaner and healthier aquarium environment and crystal-clear water. For best results, replace every 4 weeks.