OASE BioSmart 5000/10000 Green Foam Holder by Oase $ 25.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Replacement Green Filter Foam Holder (35082) for OASE BioSmart 5000 and BioSmart 10000 Pond Filters. Filter Foam Holders are sold individually. Green Filter Foam Holder Fits: Biotec 5.1 BioSmart 5000 Biotec 10.1 Biotec 10000 BioSmart 10000