Camry Filter Sponge Mat 10 m1.This product is suitable for seawater ,fresh water and aquatic plants tanks,and can be cut freely in size.2.Close pore space and softness are suitable for culturing nitrifying bacteria.3.Biochemical cotton can decompose excrement and feed residue,improve water quality,filter and clean ,thus reducing fish mortality.4.Please use fish tank water(excluding chlorine)to clean this product.Suggestion:replace one tablet every 3 months.PRODUCT SIZE:10Mx30x0.5cm