ZOOLOGIA round bio sponge 10×7 cm — aquarium/terrarium filter sponge, natural material

ZOOLOGIA round bio sponge 10×7 cm is a biological filtration sponge intended for aquarium and terrarium use. The circular shape and compact dimensions provide mechanical removal of debris and a porous surface for colonization by beneficial bacteria. Designed to fit small external or internal filters, corner inlets, or custom DIY filtration assemblies, this sponge helps maintain clearer water and reduced waste buildup in confined aquatic or humid terrarium environments.

Advantages

The sponge combines mechanical filtration and biological media in a single compact element, capturing particulates while offering extensive surface area for nitrifying bacteria. Its resilient structure tolerates repeated rinsing without rapid deformation and adapts to different installation positions thanks to the round form. The neutral, non-toxic material does not alter water chemistry and supports stable filtration performance in small-scale systems.

Suitable for

• Small aquariums with internal or hang-on filters
• Terrariums requiring moisture-tolerant biological media
• Corner inlet or outlet filter housings
• DIY filter builds and sponge pre-filters
• Breeding or quarantine tanks where gentle filtration is needed

Key specifications

• Shape: round
• Dimensions: approximately 10 × 7 cm (diameter × thickness)
• Function: mechanical and biological filtration
• Material: porous, aquarium-safe foam
• Maintenance: washable and reusable
• Compatibility: suitable for small filter housings and custom setups

How to use

Rinse the sponge in dechlorinated water or aquarium water before first use to remove any loose particles from manufacturing. Insert the sponge into the filter chamber, corner inlet, or chosen placement so that water flows through the porous material for optimal mechanical trapping and bacterial colonization. Perform gentle rinses in tank water during routine maintenance to remove accumulated debris while preserving beneficial bacterial colonies. Replace the sponge if it becomes torn, excessively compressed, or impossible to clean effectively.

Usage recommendations

For best results, pair the sponge with a coarse pre-filter or use it as the first filtration stage to extend the life of finer media. Avoid aggressive cleaning with tap water or detergents that can remove beneficial bacteria. Monitor flow and water clarity after installation and adjust positioning to ensure even water passage through the sponge.