OceanMax 8–10mm bio balls are hollow plastic spheres that host the beneficial bacteria doing the real work in your filter. The larger ball size leaves more open space for water to flow through, so they suit bigger chambers without restricting flow.
Use them in an aquarium canister, sump or hang-on filter, in a fish tank media basket, or in a pond filter to boost biological capacity. They rinse clean and keep working season after season.
Good to know:
– Ball size: 8–10mm
– Sold in a 1kg size
– Open design for larger filter chambers
– For aquarium, fish tank, sump and pond filters
– Durable plastic — rinse and reuse