Fluval Foam Filter Block 404/405

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Fluval 404 / 405 Foam Filter Block 2 pieces per display pack Fluval Foam Inserts capture large particles for effective mechanical filtration, the crucial first stage in the filtrat ion process. Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration. These inserts also enhance biological filtration. For freshwater and marine environments. Show more