A 250g filtration media bag filled with ceramic bio balls. Theis is the ideal biological filtration media due to the extremely large surface area of each bio ball. This enables the Nitrifying bacteria colonies to inhabit these bio balls in large numbers.
The ceramic balls are packaged in filter media zip net bags to ensure easy handling of these ceramic balls for use in large filters, sumps, etc. The diameter of each ceramic ball is ~ 21mm. The bags do not contain any metals (e.g. the zip itself is hard plastic) and are very durable.
Note: A €1 coin was added in the pictures to help you to estimate the size of the product.