The Rapid Clear Fine Filter Pad helps to significantly speed up filtering off flocculated particles. Smaller debris is often dificult to catch and remove from the pond. Therefore, the use of a finer disposable filter mat will allow you to catch particulate that is too fine for your mechanical filter mats. Simply place the mat inside of the skimmer box and watch the impressive results. The Aquascape Rapid Clear Fine Filter Pad is best used in combination with Rapid Clear Flocculant water treatment to enhance water clarity and quality quickly. Three 12" by 24" filter pads are included.