OASE BIOMASTER 20 PPI BLUE FILTER FOAM Pattern_Solid Color Replace your ceramic filter media

Replace your ceramic filter media only when completing a complete tank restart as to not disturb the beneficial biological load

as they feel more secure and exhibit natural behaviors when in the company of their own species

They are small

Rinse thoroughly before adding them to the tank

depending on light

OASE BIOMASTER 20 PPI BLUE FILTER FOAM Pattern_Solid Color Replace your ceramic filter mediaThe 20 ppi Replacement Filter Foam for the BioMaster 250, 350, 600, or 850 and BioMaster Thermo 250, 350, 600, or 850 includes an ultra coarse replacement filter foam 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