Aquarium filter with 3d synthetic mats

Especialy in bigger sizes aquariums you may need bigger filters.
With 3D synthetic materials (thickness between 1- 2 cm) you may do effective filters. Roll the mat with a polyester nonwoven or sponge type mat and make a filter.
As it is rolled with polyester mat the 3D synthetic mat prevents bacteria from reentering the aquarium tank. Because the mat provide a bed for bacteria to stop.