Top Fin Retreat RF-L Filter Cartridges 6-Ct

Keep your aquarium's water clean and healthy with Top Fin RF-L Large Retreat Filter Cartridges. These cartridges are easily replaceable, and feature coconut shell activated carbon, which serves to absorb undesirable odors, pigments and chlorine. Features: Coconut shell activated carbon to help absorb undesirable odors, pigments and chlorine 6 month supply Includes: 6 Count Intended For: Aquariums Color: White Product Dimensions: 7.9 in L x 2.7 in W (20 x 6.8 cm) Advice for Use: To help maintain a healthy aquarium, change filter cartridge every 3-4 weeks, or if water flow becomes obstructed. Remove cartridge when medicating water as carbon will absorb medications. Change out 10% of the water weekly or 25% monthly. Use a water conditioner (sold separately) every time you add fresh tap water to your aquarium.