Fluval 204/5/6 - 304/5 Foam Filter Block (2 Pack)
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Fluval Foams capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration 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.
For Fluval filter models: 204, 205, 206, 304, 305, 306.