Oase BioMaster Filter Foam - (20ppi Blue / 30ppi Orange)

Replacement sponge for Biomaster filter

Suitable for Biomaster 250, 350, 600, 850

30ppi has finer pores as compare to 20ppi

Customize your choice of filter foams to meet the needs of your aquarium
Timing to replace the filter foam varies upon aquarium size and the number of fish and plants