Top Fin® Internal Filter Cartridges - IF-M - Fish Tank Filter Cartridges - 20 Gallon

DESCRIPTION These Top Fin Internal Filter Cartridges make it easy to maintain a clean and healthy aquarium. Count on these easy-to-use items to help support the well-being of your aquatic pets and the beauty of their environment. Only at PetSmart. Features: With ceramic granules, activated carbon, zeolite and filter sponge2-month supply Includes: 2 CountIntended For: AquariumsColor: Gray, BlackProduct Dimensions: 5.24 in L x 2.99 in W x 0.75 in H (13.3 x 7.59 x 1.9 cm)Caution: Never use soap, detergents, or cleaning agents while cleaning the aquarium or equipment as they can harm your fish. This is not a toy. Keep out of reach of children.Advice for Use: To help maintain a healthy aquarium, change filter cartridge every 3-4 weeks, or if water flow becomes obstructed. Remove filter 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. Directions: Step 1: Remove used cartridgeStep 2: Rinse new cartridge under cool water to remove dust before placing into filter