Keep your filter boxes and pond filters running smoothly with the TotalPond Filter Pads. These replacement filter pads help improve the water quality in your pond when used with the appropriate equipment. The two included filter pads — the blue fine filter catches small debris, while the black coarse filter catches large debris — also help to biologically clean the water, promoting a healthy ecosystem in your water feature. Easily replace the filter pads during your routine seasonal replacement. We recommend changing the filter pads yearly for the best results.