Pond Filter Media, Spares & Mats

Getting the most from your filter often comes down to how the media inside is combined rather than just what it's made from. Mechanical media like foams and brushes trap debris and should sit early in the flow, while biological media such as ceramic rings and bio balls need consistent water contact to host the bacteria that break down ammonia and nitrate. As a rough guide, aim for enough media surface area and volume to comfortably match your pond's litres rather than just filling whatever chamber space is available, and use our pond filter size recommender to work out what you need before you buy. Rinse mechanical media regularly but leave biological media undisturbed as much as possible, since a mature bacterial colony is what keeps your water genuinely clear and healthy.