DYMAX Black Bio Sponge FoamLarge thick foam (5 cm thickness), can be used as biological media in any filter simply by cutting and stacking to fit any shape. Also possible to use for Hamburg Matten Filters (HMF), combining additional foam sheets can increase thickness to fit your desired size. The Dymax Black Bio Sponge in Large size, measuring 60cm x 45cm x 5cm, is a highly effective bio sponge designed to provide superior mechanical and biological filtration for both
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