Extremely inert - and easy to service ... It is available in sheet form and can be cut to the desired sizes to fit your filter chamber by using an ordinary Circular Saw
Each sheet measures 40 inches x 80 inches x 1.45 inches.
Savio Skimmerfilter™ Replacement Mat
Media bags may be used to hold biological media for most Filterfalls and filter units.
Savio Compact Skimmer Replacement Mat