Bio Marine Polyfilter Filter Media 

Standard size 8" x 4".
Breeder size 12" x 12"
This chemical filter medium is used in both fresh and saltwater environments. It can be cut to fit any type and size of filter. When it changes colour it indicates the type of materials removed showing time for a replacement. This filter removes ammonia, nitrate, copper, phosphate, antibiotics, dyes, proteins, toxic metals and insecticides including pyrethrum.