Aquarium Biochemical Filter Sponge 50x50cm – 15/30/40PPI Foam

Aquarium Biochemical Filter Sponge – 50x50x2cm

Keep your aquarium water crystal clear with this high-quality biochemical filter sponge. Designed for both freshwater and marine fish tanks, this 50x50cm polyether foam sheet delivers outstanding mechanical and biological filtration in one versatile media. Whether you're running an internal or external filter, this sponge effortlessly traps debris while cultivating beneficial nitrifying bacteria to maintain a healthy aquatic environment.

Made in Mainland China.

Key Features

• Dual Filtration: Provides excellent biochemical and physical filtration, removing particles while supporting beneficial bacterial colonies.
• Versatile Pore Sizes: Available in 15PPI, 30PPI, or 40PPI — choose the right density for your filtration needs (coarse, medium, or fine).
• Trimmable to Any Size: Easily cut to fit any filter housing, canister, sump, or pond filter — no wasted material.
• Reusable & Long-Lasting: Simply rinse and reuse; the durable polyether foam holds its shape wash after wash.
• Universal Compatibility: Suitable for freshwater aquariums, marine reef tanks, koi ponds, and internal or external filter systems.
• Excellent Water Permeability: Open-cell structure allows water to flow freely while maximising contact with beneficial bacteria.

Specifications

Package Contents

• 1 x Aquarium Filter Sponge Sheet (50x50x2cm) — choose your preferred pore size

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Learn More About Aquarium Filtration

For guidance on maintaining a healthy aquatic environment, visit the U.S. Environmental Protection Agency – WaterSense resource for water quality information.

Note: Actual colour may vary slightly due to monitor brightness and lighting conditions. Please allow minor measurement deviation (±1–2mm) due to manual measurement.

Frequently Asked Questions

Q: What pore size aquarium filter sponge should I choose – 15PPI, 30PPI, or 40PPI?

A: The pore size determines the type of filtration. 15PPI (coarse) is ideal for pre-filtration and trapping large debris in ponds or high-flow systems. 30PPI (medium) is a great all-rounder for most freshwater and marine tanks, supporting both mechanical and biological filtration. 40PPI (fine) offers superior polishing filtration for crystal-clear water, best used as a final filtration stage. Many aquarists layer two or three densities for optimal results.

Q: Can I cut this aquarium filter sponge to fit my specific filter?

A: Yes! The 50x50cm sheet is easily trimmed with scissors or a utility knife to fit virtually any filter housing — internal power filters, canister filters, sump chambers, or pond filter boxes. The polyether foam cuts cleanly without fraying.

Q: How often should I clean and replace this filter sponge?

A: It is recommended to rinse the sponge in old tank water (not tap water, to preserve beneficial bacteria) every 2–4 weeks depending on your tank's bio-load. With proper care, the sponge can last 1–2 years or more before it needs replacement. Replace when the foam starts to deteriorate or loses its structural integrity.

Q: Is this filter sponge safe for marine reef tanks?

A: Yes. The polyether material is inert and does not leach harmful chemicals, making it safe for freshwater fish, marine fish, coral, and invertebrates alike.