Fluval 204/5/6/7 & 304/5/6/7 Foam Filter Block – 2 pieces

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, 207, 304, 305, 306, 307