Your underwater companions deserve a clean and fresh aquarium on a daily basis. This is easily achievable with Top Fin's Filter Pad. This filter helps removes fine particles and keeps your aquarium maintain a healthy and safe environment. Your aquatic friends will love swimming, playing, and resting with the comfort of knowing that they're well taken care of. Only at PetSmart. Features: Remove fine particles, Helps maintain a healthy aquarium Includes: (1) Pad Intended For: Top Fin Canister Filter Color: White Size: Available in Medium and Large Instructions: Use 1 Top Fin Filter Pad for the Top Fin Canister Filter. Rinse pad thoroughly before inserting in filter. Place directly into chamber. To help maintain a healthy aquarium, rinse filter pad as needed, and replace every 4-6 weeks. Discard after use. 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. Never use soap, detergents or cleaning agents while cleaning the aquarium or equipment as they can harm your fish. Caution: This is not a toy. Keep out of reach of children. Size: Small.