Frequent power outages pose a significant threat to aquarium inhabitants, leading to oxygen depletion and filtration failure. This review focuses on the Hygger HG-908 Biochemical Sponge Filter as a potential solution for maintaining aquarium health during power disruptions. The reviewer, experiencing frequent outages due to wildlife interference, sought a reliable backup filtration system to complement their existing battery-powered air pump. This review details the setup, initial impressions, and planned long-term testing of the HG-908, examining its effectiveness as a crucial component of a comprehensive power outage preparedness plan for aquariums.The Hygger HG-908 is a versatile sponge filter designed for tanks ranging from 15 to 55 gallons. Its design incorporates a telescopic tube for adjustable height and placement, allowing for discreet integration into any aquarium setup. The filter utilizes a dense sponge for mechanical filtration and includes ceramic media to support beneficial bacteria for biological filtration. This review will cover the filter's unboxing, initial setup, integration with a Cobalt Aquatics battery backup air pump, and ongoing performance observations, culminating in a comprehensive assessment of its suitability as a reliable backup filtration system during power outages.
Pros And Cons
- High-quality, fine sponge for good filtration
- Comes with extra sponges
- Telescopic return tube for adjustable height and placement
- Includes ceramic media balls for biological filtration
- Affordable (around $20 on Amazon)
- Sponges initially compressed in packaging, requiring time to fully expand
Read more: 5 Amazing 3-Stage Aquarium Sponge Filters
The Problem: Power Outages and Aquarium Safety
Frequent power outages are a significant concern for aquarium owners. Loss of power can lead to oxygen depletion and compromised filtration, threatening the health of your fish. This review explores a potential solution: the Hygger HG-908 Biochemical Sponge Filter.
The reviewer's location experiences frequent power outages due to squirrels disrupting power lines. This necessitates a backup system to maintain crucial aquarium functions even during outages.
Introducing the Hygger HG-908
The Hygger HG-908 is a biochemical sponge filter designed for aquariums ranging from 15 to 55 gallons. It utilizes a fine sponge for efficient filtration and includes ceramic media balls to support beneficial bacteria growth and biological filtration.
The reviewer already owns various Hygger products and has had a positive experience with the brand's quality and performance. They chose the HG-908 to integrate into their existing cobalt aquatics battery backup air pump system.
Unboxing and Features
The Hygger HG-908 arrives in attractive packaging. The package contains the filter unit, a fine sponge, ceramic media balls, and extra sponge replacements. The filter's design incorporates a telescopic tube for adjustable height and placement within the aquarium.
The sponge is notably dense, suggesting effective filtration. The telescopic tube allows for versatile placement, enabling hiding the filter behind aquarium decor.
Integration with Backup Air Pump
The primary goal is to use the HG-908 filter with the reviewer's existing cobalt aquatics battery backup air pump. This would provide both aeration and filtration during power outages.
The reviewer plans to position the filter low in the tank to conceal it and prevent excessive water agitation. They may use airline tubing extensions if the filter's length proves insufficient to reach their air pump.
Performance and Initial Impressions
The filter is currently cycling and providing additional hiding spaces for the fish. The reviewer notes that the cobalt aquatics battery backup air pump still provides sufficient power for the filter, even on battery power alone.

An update video is planned to assess long-term performance, including testing with different air pumps and measuring the filter's cleaning efficiency.
Conclusion and Recommendations
The Hygger HG-908 is a well-designed filter that appears promising for providing backup filtration during power outages. The fine sponge material and included ceramic media suggest effective mechanical and biological filtration. Its adjustability and versatile placement are valuable features.
The integration with the reviewer's backup air pump is currently successful. A future update will provide a more comprehensive assessment of performance and long-term effectiveness. For aquarium owners concerned about power outages, this filter warrants consideration.