Aquarium Ceramic Rings & Balls for Filter Media

When choosing ceramic media, match the quantity to your filter's media basket size and your aquarium's volume — as a rough guide, fill at least a third to half of the available media space to give bacteria enough surface area to establish properly. Ceramic rings and balls work best as a biological stage, so position them after any sponge or floss layer that traps larger debris, ensuring water passing through is already reasonably clear. They're a one-off, low-cost addition that keeps working quietly for months, and unlike sponge media, they rarely need replacing entirely — a gentle rinse in old tank water during regular filter maintenance is usually enough to keep them performing well without disturbing the bacterial colony they host.