hygger Aquarium Double Sponge Filter with 2 Spare Sponges (S) Review (2026)

Who this sponge filter fits

This size S double sponge filter is built for small tanks, breeding setups, and shrimp or betta colonies rather than a heavily stocked community aquarium. Its air-powered, submersible design produces gentle water movement, which suits fry, shrimp, and other small or delicate inhabitants that can get pulled into a stronger powered filter's intake. Because it comes with 2 spare biochemical sponges included in the box, it suits keepers who want backup media on hand from day one rather than needing to order replacements separately once the originals wear out. It is rated for freshwater or saltwater use, giving it some flexibility across tank types, though the small size limits it to nano or lightly stocked setups rather than anything larger or more heavily fed.

What's included and how it works

The unit ships with the double sponge filter body, a bag of bioceramic media balls, and 2 spare sponges stored inside that same media container, giving a full spare set beyond the sponges already installed on the filter. It runs on rising air from a separate air pump, which is not included, drawn up through the sponge and bioceramic ball chamber to create suction that pulls tank water through the filter media. The sponge handles mechanical filtration, trapping debris and uneaten food, while its porous surface along with the bioceramic balls gives beneficial bacteria a place to colonize for biological filtration, so the unit covers both filtration types in a single compact package suited to smaller tanks.

Using it and maintaining it

Because this is an air-driven design, it needs a compatible air pump and airline tubing connected before it will move any water, so budgeting for a small air pump is part of the real cost of running this filter if one is not already on hand. Sponge filters like this one are gentle enough to leave fry, shrimp, and small fish undisturbed, which is a large part of their appeal in breeding and nano setups. Routine maintenance means squeezing the sponge out in tank water periodically to clear trapped debris without killing off all the bacteria living on it, and having 2 spare sponges in the box means a full swap is possible without an extra purchase when the originals eventually need replacing.

How it compares with other sponge filters

Against AQUANEAT's large sponge filter rated up to 60 gallons or Aquapapa's double sponge design rated to 55 gallons each, this hygger size S is built for a noticeably smaller niche, nano and small tanks rather than mid-size or larger aquariums. hygger's own mini sponge filter for 2 to 5 gallon tanks sits below this size S model, while hygger's larger sponge filter for 8 to 20 gallon tanks sits above it, giving the brand a clear size ladder to move through as a tank grows. For a dedicated shrimp or betta tank that will never scale up much, this size S model is well matched, but anyone planning to grow into a bigger tank later may prefer sizing up from the start rather than replacing the filter.

Verdict and who should pick something else

This sponge filter earns its spot as a gentle, dual-purpose filtration option for nano tanks, betta setups, and shrimp colonies, backed by spare sponges that delay the first replacement purchase. Pick it for a small, lightly stocked tank where gentle flow protects fry or shrimp, and remember an air pump is a separate purchase if one is not already running. Choose a larger sponge filter or a powered filter instead for anything bigger or more heavily stocked, since this size S unit is not built to keep pace with a larger bioload.

Frequently asked questions