Seachem Matrix Bio-Media for Marine and Freshwater Aquariums Size:250 ml This 36 inch model fits

This 36 inch model fits aquarium frames between 35 Inches and 39 Inches

and they can survive for months

rotate one of the cleaners by 90 degrees to separate it

aquatic frogs and cleaning debris

Seachem Matrix Bio-Media for Marine and Freshwater Aquariums Size:250 ml This 36 inch model fitsSeachem Matrix Bio Media is a highly porous media designed to provide exceptionally efficient biofiltration for single site removal of ammonia, nitrite, and nitrate from freshwater, marine, and reef aquaria. Premium natural bio filter support media Removes ammonia, nitrite and nitrate from fresh, salt and reef tanks 1 liter is equivalent to over 40 L of typical plastic ball media Each liter of Matrix provides over 160,000 cm2 (170 sq. ft.) of surface,