8D Bio Sponge Aquarium Filter – 8-Layer Biochemical Cotton
8D Bio Sponge Aquarium Filter – 8-Layer Biochemical Cotton
8D 8-Layer Aquarium Bio Sponge Filter – Biochemical Cotton for Crystal-Clear Water
Upgrade your aquarium's filtration with this professional-grade 8D Biochemical Filter Sponge. Engineered with 8 dense layers of no-glue foam, this bio sponge provides superior mechanical and biological filtration for both freshwater and marine aquariums. Its unique multi-porous structure maximizes surface area, making it easy for beneficial nitrifying bacteria to colonize and thrive — keeping your tank ecosystem healthy and balanced.
Key Features
- 8-Layer Multi-Porous Design: The dense, layered structure traps waste particles efficiently while providing an enormous surface area for beneficial bacteria colonies to establish and flourish.
- No-Glue Construction: Made without adhesives — completely safe for fish, invertebrates, corals, and all aquatic life in freshwater and saltwater setups.
- Activated Carbon Cotton Layer: Helps neutralize unwanted odors and keeps aquarium water smelling fresh and clean.
- Custom-Cuttable: Easily trimmed with scissors to fit any filter box, sump, canister, or DIY filtration system — no special tools required.
- Excellent Water Permeability: Promotes steady water flow through the media, cultivating nitrifying bacteria for effective biological filtration without restricting circulation.
- Durable & Reusable: Thick, high-quality foam construction holds its shape over time. Simply rinse with aquarium water and reuse — reducing ongoing costs.
- Lightweight & Soft: Easy to handle, cut, and install in any filtration configuration.
Available Sizes
- 50 x 11 x 2 cm
- 40 x 30 x 2 cm
- 50 x 40 x 2 cm
- 120 x 30 x 2 cm
- 120 x 50 x 2 cm
- 200 x 40 x 2 cm
What's in the Box
- 1 x Fish Tank Bio-Sponge Filter Sheet
How to Use – Important Tips
- Pre-soak before first use: Submerge the sponge in your aquarium water for approximately 5 minutes before placing it in the filter. This helps nitrifying bacteria begin colonizing immediately.
- Rinse with aquarium water only: When cleaning, always use room-temperature aquarium water — never hot tap water — to preserve the beneficial bacterial colonies living in the sponge.
Made in Mainland China.
For more information on aquarium nitrogen cycles and biological filtration best practices, visit the U.S. Environmental Protection Agency – Water Resources.
Frequently Asked Questions
Q: Is this aquarium bio sponge safe for saltwater and reef tanks?
A: Yes! The 8D biochemical filter sponge is made without glue or harmful adhesives, making it completely safe for both freshwater and marine/saltwater aquariums, including reef tanks with corals and invertebrates.
Q: Can I cut the bio sponge to fit my filter?
A: Absolutely. This filter sponge is designed to be easily cut with standard scissors to fit any canister filter, hang-on-back filter, sump, or custom DIY filtration setup. Choose the size closest to your needs and trim as required.
Q: How often should I clean or replace the aquarium filter sponge?
A: Rinse the sponge gently in a bucket of used aquarium water every 2–4 weeks, depending on your tank's bio-load. Avoid tap water or hot water, which can destroy beneficial bacteria. The sponge can be reused many times before needing replacement, making it a cost-effective filtration solution.
Q: What does the activated carbon layer do?
A: The activated carbon cotton layer in this bio sponge helps absorb and neutralize fishy odors and minor impurities from the water, contributing to a cleaner, clearer, and fresher-smelling aquarium environment.