Premium Black Biochemical Sponge Filter Pad (50x50x4cm)
Upgrade your aquarium or pond's filtration capacity with our Heavy-Duty Biochemical Sponge Pads from Atradesen.com. Measuring a massive 50x50cm with a thick 4cm profile, this highly porous foam is the ultimate media for trapping floating debris while cultivating a massive colony of beneficial nitrifying bacteria to keep your water crystal clear.
🌟 Advanced Filtration & Reusability
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Dual-Action Bio-Media: Effectively traps fish waste and uneaten food (mechanical filtration) while the microscopic pores provide a perfect breeding ground for bacteria that break down toxic ammonia and nitrites (biological filtration).
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Washable & Never Deforms: Made from premium, high-resilience synthetic foam. It maintains its shape and structural integrity even after months of use and repeated rigorous washings, saving you money on disposable cartridges!
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100% Custom Cut-to-Fit: Don't be restricted by factory filter sizes! Simply use standard scissors or a utility knife to cut this massive pad to perfectly fit your specific hang-on-back filter, canister, sump, or trickle box.
⚠️ Pore Size Selection Guide (Crucial!)
Choosing the right pore size is essential to prevent overflows and maintain water clarity. Please read the Atradesen.com guide below:
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Large Hole (Coarse): Best for the first stage of filtration or outdoor ponds with heavy bioloads. Allows high water flow and traps large debris like fish poop without clogging quickly.
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Medium Hole: The perfect balanced sponge for standard indoor aquariums and general mechanical/biological filtration.
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Small Hole (Fine): Best used as the final "polishing" stage in already relatively clean water. Traps the tiniest micro-particles for ultimate clarity, but will clog very quickly if used as the very first layer in a dirty tank.
