Sponge ZOOLOGIA Bio round 12×7 cm — aquarium/terrarium filtration and cleaning accessory

ZOOLOGIA Bio round sponge 12×7 cm is a rounded foam pad designed for biological filtration and routine cleaning in aquariums and terrariums. The open-cell structure provides a protected surface for beneficial nitrifying bacteria to colonize, supporting natural biological water treatment. The sponge also traps suspended debris and particulates while allowing water flow, making it suitable as a replacement or supplementary filter media and for gentle surface cleaning of glass, acrylic and plastic surfaces in aquatic and terrarium setups.

Advantages

The sponge’s rounded shape and uniform pore structure ensure even water distribution and efficient capture of mechanical waste without significantly restricting flow. Its material is resilient and compressible, enabling easy fitting into a variety of filter housings and corners. Because it promotes bacterial colonization, the sponge contributes to stable nitrogen cycle processes and helps reduce ammonia and nitrite spikes when used as part of a biological filtration system.

Suitable for

• Replacement or supplementary filter media in internal and external aquarium filters
• Biological filtration in terrarium water features and paludaria
• Routine surface cleaning of aquarium glass, acrylic or plastic without scratching
• Pre-filtration to protect finer mechanical and chemical media

Key specifications

• Shape: round
• Dimensions: approximately 12 × 7 cm
• Material: open-cell foam suitable for bacterial colonization
• Function: mechanical debris capture and support for biological filtration
• Compatibility: fits typical filter compartments and can be trimmed to size

How to use

Rinse the sponge in dechlorinated water before initial use to remove any manufacturing residues. Place the sponge in the filter compartment or designated area, ensuring it does not block water inlet or outlet passages. When used for surface cleaning, squeeze excess water and use gentle motions to wipe glass or acrylic surfaces. Replace or clean the sponge periodically: rinse in aquarium or terrarium water during maintenance to preserve beneficial bacterial colonies, and replace when the foam shows signs of permanent compression, tearing, or irreversible fouling.

Usage recommendations

For biological filtration, avoid aggressive cleaning with tap water or disinfectants that can remove nitrifying bacteria. Rinse the sponge in water removed during routine partial water changes and inspect monthly; trim to fit if necessary to maintain unobstructed flow. Store dry spares in a clean, dust-free place.