Super Grade 20″x20″x2″ Black Sponge for external filters, sumps and pond filters
Excellent water permeability.
Can be used again after cleaning.
Can be cut any sizes as your needed.
Suitable for using in freshwater and marine water.
Cultivate the nitrifying bacteria for biological filtration.
Offers good biochemical and physical filtration effects.
EXCELLENT
Based on 816 reviews
Varuna Baglodi (verified owner) –