Activated Filter Media (AFM®)

Developed by marine biologists, AFM is a direct replacement for sand and crushed glass. It has been independently tested and proven to double the performance of sand filters and outperform all other media on the market.

AFM Grade 1 Fine 0.4-1.1mm
AFM Grade 2 Medium 1-2mm
AFM Grade 3 Coarse 2-4mm