Biocell blue foam from amtra 18 x 12 x 6 cm is the mechanical synthetic sponge aquarium filter, an excellent support for bacterial settlement.

Features

Biocell blue foam has a mechanical water filtering action that allows the removal of suspended dirt particles.

Biocell blue foam can be used as a useful bacterial support for biological filtration.

Biocell blue foam is cmpletely nontoxic and does not release any ssotance into the aquarium. Biocell blue foam can be easily cut to the desired size to fit all types of internal, external filters.

Biocell blue foam is suitable for use in both freshwater and marine water aquariums.

Biocell blue foam you are reading about has a porosity in PPI of 20. The term "PPI" (pores per inch - Inch) refers to the number of pores present in a linear stretch of one inch (25.4 mm) and is a measure of linear pore density. A filter with very small pores has a higher PPI number and is a denser filter, that is, it filters out smaller particles. Many gradations of cellular porosity can be made, from 10 up to 90 PPI, where the higher the number of pores per inch, the more closed the filter. A closed filter with more PPI is more efficient at filtering pollutants, but offers more resistance to water flow.

Biocell blue foam from amtra available is 18 x 12 x 6 cm and has an average porosity of 20 PPI