OASE Indoor Aquatics Filter Foam Sets of 2 for The Biocompact 50

The Filter Foam Set For The Compact 50 Includes 2 Replacement Filter Foam Sets Each Set Includes Coarse And Fine Filter Foams Timing To Replace The Filter Foam Set Varies Upon Aquarium Size And The Number Of Fish And Plants Package Dimensions: 4.92" L X 1.18" W X 7.28" H