6pcs Aquarium Biochemical Sponge Filter Mechanical and Biological Fish Tank Filtration Sponge For top Filter

Aquarium filter sponge use for freshwater and saltwater aquarium. According to the analysis of the experts, products with this pore gap and flexibility and the most suitable breeding grounds for cultivating the fine nitro bacteria. The filter cotton sponge has the best effect on decomposing the excrement and the forage left over. improving the filtering, cleaning. it can reduce the death rate of fish.