Filter Media AquaNatura Nano Bacteria House Square L 155×35 mm, pack of 20

AquaNatura Nano Bacteria House Square L is a pack of 20 modular filter media pieces sized 155 × 35 mm, designed to increase the colonizable surface area inside aquarium filtration systems. Made for use in canister filters, hang-on filters or custom filter housings, these square-profile media promote biological filtration by providing a stable substrate for nitrifying and denitrifying bacteria. They are suitable for both freshwater and marine aquaria where improved conversion of ammonia and nitrite to less harmful compounds is required.

Advantages

The Nano Bacteria House Square L offers consistent, repeatable geometry that maximizes surface area while maintaining good water flow through and around each module. Supplied as a set of 20 identical pieces, the media are easy to position and stack in multiple filter types, helping to maintain stable biological filtration over time. Their size and shape enable even distribution of bacteria and minimize dead zones, supporting reliable water quality management.

Suitable for

• Canister filters in small to medium aquaria
• Hang-on-back filters and external filter modules
• Custom filter boxes, sump chambers and DIY filtration rigs
• Freshwater and marine systems requiring biological filtration

When it may not be suitable

This media is primarily intended as biological support and does not provide mechanical or chemical filtration on its own; coarse mechanical prefiltration is recommended to prevent clogging. For very large aquaria or systems with extremely high bioload, additional or larger volumes of biological media may be required. If precise chemical control (e.g., phosphate removal, activated carbon polishing) is needed, complementary media should be used alongside these modules.

Key specifications

• Quantity: 20 pieces per pack
• Individual module size: approximately 155 × 35 mm
• Shape: square-profile modular pieces designed for stacking and packing
• Intended function: biological filtration substrate to promote beneficial bacterial colonization
• Compatible water types: freshwater and marine

How to use

Rinse each piece briefly with aquarium water before first use to remove any loose particles from manufacturing. Place the media in the biological chamber of a canister, hang-on, sump or custom filter so that water flows through and around the modules. Arrange pieces to allow uniform flow and avoid tightly packed areas that could restrict circulation. Monitor ammonia and nitrite levels during the initial weeks after installation to confirm establishment of the bacterial colony; cycling may take several days to weeks depending on system conditions.

What to consider before purchase

• Verify available space in your filter unit to accommodate 155 × 35 mm modules
• Plan for mechanical prefiltration to reduce particulate load on the biological media
• Determine required quantity of biological media based on aquarium volume and stocking levels
• Consider combining with chemical media if adsorption or polishing is required

Usage recommendations

For stable biological performance, replace or clean mechanical prefilters regularly and avoid replacing all biological media at once. When supplementing existing media, add new pieces gradually to maintain established bacterial colonies while increasing overall surface area.