Hobby Filter sponge coarse blue 50 x 50 x 2 cm, PPI 10

The coarse blue filter foam removes larger particles before the water reaches finer filtration media. Its open-cell structure also provides colonisation area for beneficial bacteria, allowing the material to support biological filtration after maturation.

The two-centimetre thickness is particularly useful in shallow filter chambers and layered filtration arrangements where installation space is limited.

Key features

• Coarse blue filter-foam sheet
• Mechanical and biological filtration
• Captures coarse debris
• Provides surface area for beneficial bacteria
• Suitable for freshwater aquariums
• Suitable for marine and reef aquariums
• Pore density: 10 PPI
• Dimensions: 50 × 50 × 2 cm
• Thickness: 2 cm
• Can be cut to size
• Suitable for internal and external filters
• Suitable for sump chambers
• Suitable as a prefilter
• Protects pumps and water intakes
• Good water permeability
• Low flow resistance
• Washable and reusable
• Suitable for custom filtration systems

Technical information

• Product: Hobby Filter Sponge Coarse Blue
• Type: coarse filter-foam sheet
• Filtration: mechanical and biological
• Colour: blue
• Pore density: 10 PPI
• Dimensions: 500 × 500 × 20 mm
• Water types: freshwater and marine
• Cut-to-size: yes
• Washable: yes
• Reusable: yes
• Manufacturer: Hobby Aquaristik

Directions

1. Measure the internal dimensions of the filter chamber.
2. Mark the required shape on the foam.
3. Cut the material with a long, sharp knife.
4. Make the piece slightly larger than the filter opening.
5. Rinse the new foam before use.
6. Install it without excessive compression.
7. Position it before finer filter media in the direction of water flow.
8. Check that water passes evenly through the material.
9. Clean the foam when water flow begins to decrease.
10. Rinse established biological foam in removed aquarium water.
11. Replace the material when it becomes brittle, damaged or permanently compressed.