ultra-soft heated cat bed Oase BioMaster 20 ppi Blue Filter Foam

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  • The 20 ppi Replacement Filter Foam for the BioMaster , , , or  and BioMaster Thermo , , , or  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