Two-color Double-layer Filter Double-effect Filtration Cotton For Fish Bowl Aquarium

--High water permeability-basic filter cotton, soft double layer, dense and strong water permeability, fast water permeability

--Effective bacteria cultivation-provides a breeding and growth hotbed for nitrifying bacteria.

--Good water permeability-imitating plant fiber has little resistance to water and can effectively filter dirt.

--Two densities-green and white cotton two-color cotton, which can filter fine impurities more perfectly.

--Size: 120x30x0.8cm.