Fluval Evo 13.5 Foam Filter Block The Fluval Evo 13.5 Foam Filter Block is a genuine replacement foam block for compatible Fluval Evo and Spec aquariums, providing effective mechanical filtration by trapping large particles and debris. Foam Block for Evo 13.5 Filtration Replacement foam block for the Fluval Evo 13.5 US gal / 52 L aquarium kit. Also compatible with the Fluval Spec 16 US gal / 60 L aquarium kit. Traps larger debris before water passes through additional filter media. Helps maintain water clarity and steady filter performance. Designed to fit the original rear filtration chamber. Evo Foam Filter Block Details Item number: 10532 UPC: 015561105323 Media type: mechanical foam filter block Use: replacement media for compatible Fluval Evo and Spec aquariums Official Fluval Filter Media Video Replacing the Evo Foam Block Remove the used foam block, transfer any reusable media as needed, and install the new block in the same position. Rinse foam in aquarium water during service to reduce loss of beneficial bacteria. What’s Included 1 foam filter block