Using the Fluval U Bio - Foam Pad is easy. First, choose the right size pad according to your filter model. Place it inside the filter chamber, making sure it fits properly to prevent debris from bypassing. For regular maintenance, check the pad every few weeks. If it looks dirty or clogged, you can gently rinse it in aquarium water. Don't use tap water as it may contain chemicals that can harm your aquatic or reptile pets. Replace the pad when it can no longer be cleaned effectively or has lost its filtering ability. Remember to keep it in a dry place when not in use to maintain its quality.