AQUA Sponge Filter NSF-120L Two-Chamber for aquariums, capacity 120 L

AQUA Sponge Filter NSF-120L Two-Chamber for aquariums, capacity 120 L is a compact internal filtration unit engineered for freshwater aquaria up to 120 litres. The design separates mechanical and biological filtration into two sponge chambers, enabling efficient trapping of debris in the first chamber while promoting beneficial bacterial colonisation in the second. The filter is driven by an external air pump (not included) and produces a gentle, diffused flow that supports oxygenation and stable water conditions without stressing small or delicate aquatic animals.

Advantages

The two-chamber configuration provides staged filtration—coarse particles are retained in the first sponge while the second sponge offers a larger surface area for nitrifying bacteria. Operation via airlift keeps water movement gentle and well-oxygenated, suitable for fry, shrimp and livebearers. The sponges are removable and washable, allowing maintenance without disturbing biological media. The compact footprint and simple mounting make it suitable for small to medium tanks and breeding setups where low flow and reliable biological filtration are required.

Suitable for

• Freshwater community aquariums up to 120 L
• Breeding tanks and fry rearing
• Shrimp and nano tanks requiring low flow and high oxygenation
• Quarantine or hospital tanks where gentle filtration is preferred

Key specifications

• Recommended aquarium capacity: up to 120 litres
• Filtration type: two-chamber sponge (mechanical + biological)
• Drive method: airlift using external air pump (air pump not included)
• Flow characteristics: gentle, diffused upward flow for oxygenation
• Maintenance: removable washable sponge media
• Mounting: internal placement with compact footprint

How to use

Install the AQUA NSF-120L inside the aquarium according to the included mounting options, ensuring the unit is fully submerged. Connect an appropriate external air pump to the filter’s airline; adjust the air flow at the pump or via an in-line valve to achieve a gentle, even water movement that does not disturb plants or fry. Prime the filter by allowing the airlift to establish circulation; observe for stable bubbles and water turnover. Clean the sponges periodically by rinsing in tank water during water changes to preserve beneficial bacteria while removing trapped debris.

Usage recommendations

For best results pair the filter with an adjustable, properly sized air pump and check airflow regularly. When cleaning, avoid using tap water with strong chlorine; use aquarium water to maintain biological activity. Monitor flow and water parameters after installation, and reduce air flow if it creates excessive surface agitation or stress to livestock.