Aquarium Crystal Bio-Chem Internal Filter Replacement Fish Tank Activated Carbon Filter Cartridges for XP-05 09 11 13 or XP-03 03B(XP-05 09 11)

【Makes Water Clean】High efficient filter to removes debris colors and odors, makes water clean and crystal clear. 【Easy to Install】Quick and easy to install, no tools required for freshwater, saltwater, and reef aquariums. 【Perfect Replacement】Fit for XP-05 09 11 13 or XP-03 03B (Optional). Perfect replacement for the original replacement. 【High Efficient】Contains a unique superior activated carbon and Cotton blend that removes compounds 3x more effectively than carbon alone. 【Pay Attention】Use when starting or maintaining an aquarium, replace monthly or sooner if aquarium is heavily stock or colors and odors are detected.