Using this Fluval impeller brush set is easy. First, turn off your filter motor to avoid any accidents. Then, gently insert the appropriate brush into the areas you want to clean, like the impeller, impeller cover, well, or shaft. Move the brush back and forth to remove dirt and debris. For hard - to - reach spots, use the thinner brush. When you're done cleaning, rinse the brushes thoroughly with clean water. As for maintenance, make sure to dry the brushes completely after each use to prevent mold growth. Keep them in a dry place. And always remember to turn off the motor before cleaning to protect both you and the equipment.