Best Sponge Filters for 2026: 8 Picks for Betta, 10 and 20 Gallon Tanks

Our verdict

Our Top Picks at a Glance

Four air-driven sponge filters and four with a small built-in pump, each with its maker’s tank size, power needs and cleaning cautions; we have not tested them. The eight are six models from three brands; two models appear in two sizes.

Compare the picks

Compare the 8 sponge filters

Tank sizes are each maker’s own figure; where a maker’s pages disagree, both are shown.

AllAir-drivenNo air pump

8 of 8 sponge filters

Sponge filter	Suited to	Tank size	Drive	Price	Specs
AQQA AQ046, SAir-driven, 5-20 gal	AirBetta10 gal	5-20 gal	Air pump	Check current price	Specs
hygger HG120, MAir-driven, 20-55 gal	Air20 galShrimp	20-55 gal	20-55 gal, under 19.7 in deep	Check current price	Specs
hygger HG120, LAir-driven, 55-125 gal	AirLarge tanks	55-125 gal	55-125 gal, under 26.4 in deep	Check current price	Specs
hygger HG256, STwin sponges, 10-40 gal	Air20 galBetta	10-40 gal	Air, 2.5 W	Check current price	Specs
hygger HG176, SUSB pump, small tanks	USBNanoShrimp	Under 10 gal	Under 10 gal (size label); under 20 gal (manual)	Check current price	Specs
hygger HG176, MUSB pump, larger sibling	USB20 gal	Under 30 gal	Under 30 gal (size label); under 45 gal (manual)	Check current price	Specs
AQQA AQ190, SUSB pump, 10-40 gal	USBFryFreshwater	10-40 gal	USB, 3 W	Check current price	Specs
Aquatop PowerFlow PSF-1Built-in pump, 50 GPH	Plug-inNanoQuarantine	"Small aquariums"	Plug-in pump	Check current price	Specs

Air or USB: Choosing a Sponge Filter

How it works. hygger describes the air-driven kind: “The air pump pushes air through the air stone. Rising bubbles create suction through the sponge.” The sponge traps debris, and the sponge and the ceramic media below give beneficial bacteria a surface, per hygger. The USB and plug-in models use a small water pump instead; Aquatop says its PSF-1 “operates independently” of an air pump and airline.

Size it to the tank. Each maker rates its sizes by tank volume, and hygger also by depth: the HG120 Medium is “suggested for 20-55 Gal medium-sized aquariums under 19.7″ depth”. The FAQ below lists which picks cover 10- and 20-gallon tanks. On long tanks, one r/Aquariums owner wrote: “I would use two on tanks 2ft+ long for avoiding water circulation problems.”

Air pump and check valve. None of the air-driven picks includes a pump. hygger asks for “an air pump ≥ 2W” on the HG120 M and “≥ 5W” on the L, and lists 2.5 W for the HG256 S; AQQA gives no wattage, only “prepare a suitable air pump for this filter according to your tank size”. On a Fishlore thread, a member wrote: “Flow and sound volume depend on your air pump. So the filter itself is irrelevant. Rather get an inline valve for the air hose and a check valve to control air pressure.” hygger’s HG256 manual says the filter “must be connected with applicable size of air pump and equipped with a check valve on the air tube to prevent flow-back during power failure.” hygger’s HG120 manual does not mention a check valve; AQQA’s AQ046 manual recommends one. Our air pump roundup compares pump output and noise.

Flow gentleness for bettas, shrimp and fry. Every maker here lists bettas or shrimp among the intended uses, but only some describe the flow: hygger calls the HG256’s flow “adjustable, small, and slow”, and Aquatop says the PSF-1’s “consistent 50 GPH flow rate” is “well-suited for nano aquariums, shrimp, fry”. AQQA and hygger publish no flow figure for the AQ046 or HG120. If a filter still pushes a betta around, our guide to reducing filter current lists what to fit on a sponge filter: “an air control valve and a check valve.”

The sponge. None of the three makers publishes a pore size (ppi) for these filters on the pages and manuals we read. On r/PlantedTank, one owner wrote: “The quality of the foam itself matter far more than most other elements of their design, and anything between 20-30ppi works well.”

Cleaning. Every maker that gives a method says tank water. hygger’s HG120 manual: “Don’t use tap water or hot water to clean the biochemical sponge filter.” Most give “every 2 ~ 4 weeks”; Aquatop gives no interval.

If fish look unwell, test the water and contact an aquatic veterinarian.

How We Chose These Sponge Filters

Our sponge filter criteria

These are our filter criteria, applied to both filter types here (air-driven and pump-driven), value last:

• Flow rate for the tank size: the maker’s rated GPH where published (48-80 GPH on the four pump-driven picks); on the air-driven picks the air pump sets the flow and no GPH is published, so the maker’s rated tank size and air pump size stand in.
• Media capacity, open baskets vs cartridges: every pick holds biological media under or beside the sponge, ceramic balls or pearls on the AQQA and hygger picks, “porous biological media” on Aquatop’s; hygger gives 100 ml for the HG256 S and 50 g for the HG176, the others give no capacity.
• Noise: we found no measurement. AQQA claims “under 30 dB” for the AQ190; owner reports on bubble noise are quoted where we found them.
• Maintenance and cleaning interval: each maker’s own interval, quoted in the reviews.
• Priming and installation: none needs priming like a hang-on-back or canister; the makers’ setup step is soaking or squeezing the sponge first (AQQA, hygger), and installation is suction cups, a clip or sitting on the bottom.
• Flow gentleness for bettas, shrimp and fry: each maker’s stated uses and flow wording.
• Cartridge running cost: none uses cartridges; hygger and AQQA (AQ046) advise replacing the sponge and ceramic media every 5-6 months, and Aquatop says to avoid replacing the sponge “unless necessary”.
• Warranty: each maker’s term, in the reviews; hygger, Aquatop and AQQA (for the AQ190) tie it to buying from an authorized dealer.
• Value: the live price in the boxes above against the maker’s own list price, which no pick exceeded when we checked.

To be a pick, each also had to be on sale on Amazon on November 6 from a store tied to the maker (below), at or below the maker’s own list price.

Sellers, and the brands left out and what owners say in the ranking threads

Sellers, and the brands left out

No sponge filter we found was sold by Amazon.com itself. hygger’s warranty page lists its authorized Amazon stores: usmagob and Jnkany, which sell picks 2, 3, 5 and 6, are on it by name; pick 4’s seller, AquaFocus, matches the list’s “AquaFcous” by spelling only. Aquatop’s warranty page names TruAqua, pick 8’s seller, among “the only authorized Amazon, Walmart, and Ebay sellers”. AQQA’s own product pages link the exact Amazon listings for picks 1 and 7; pick 7’s seller, “AQQA Aquarium”, is registered on Amazon to a different company from the one named in AQQA’s manuals, so its authorization rests on AQQA’s link alone. Hikari’s online reseller page says “online reselling of our products must be approved by us in advance to use any of our trade dress, trademarks, product images or other intellectual property”, and we could not confirm any Amazon seller of its Bacto-Surge filters was approved; AQUANEAT, Pawfly, UPETTOOLS, XINYOU and Aquarium Co-Op are left out for want of a maker-tied Amazon store or list price. Pick 4 shares a family with the sponge pick in our fish tank filter roundup (see its review).

What owners say in the ranking threads

On r/Aquariums, one owner wrote: “It’s all the same thing whatever brand you buy. Get the cheapest one that’s appropriately sized.” Aquarium Co-Op’s coarse sponge splits owners: one said it “doesn’t really plug up”, another that coarse sponges “release a ton of crap into your tank when they get moved” (r/Aquariums).

Detailed Reviews: The 8 Sponge Filters

AQQA AQ046, S, Air-driven, 5-20 gal

Evidence: No independent test; maker specs. Source: AQQA.

AQQA’s page says “The small filter is suitable for 5-20 gallon tanks” and that it “works great in breeding fry tanks, shrimp and betta fish tanks, and both freshwater and marine tanks.” The manual gives the size as 3.94 x 2.36 x 2.36 inches, for tanks “Below 40cm” deep, with “4mm/0.16″ (Inner diameter) air tubing”. To sink it: “squeeze the sponge repeatedly, making sure the air is completely out of a sponge.” Two sponges ship stacked; the manual says to keep one as a spare. AQQA’s manual gives a “1-year free warranty.” The listing showed 4.2 stars from 809 ratings on November 6. Among its Amazon reviews (size not stated), one owner wrote “This is a great little filter – and works great in my 10 gallon tank with mystery snails and guppies”, another “Works – ish, but not great. Was in my tank for about a 3.5 weeks and I threw it away”.

Maker cautions: “This product needs to be connected to an air pump (NOT INCLUDED). It is recommended to use a check valve on the air pipe to prevent water from flowing back to the air pump.” “a. Don’t use tap water or hot water to clean the biochemical sponge filter. b. Make sure cleaning the filter with tank water. c. Make sure the sponge filter is on vertically, otherwise the pipe will be blocked by the ceramic pearls. d. Clean the filter with tank water every 2 ~ 4 weeks. e. We recommend replacing the sponge and ceramic pearls every 5 ~ 6 months.”

Specs (linked: AQ046, S-Filter, 5-20 gal)

• Tank: 5-20 gal, under 40 cm deep; airline 4 mm; air pump watts not published (maker)

hygger HG120, M, Air-driven, 20-55 gal

Evidence: No independent test; maker specs. Source: hygger.

hygger’s page suggests the Medium “for 20-55 Gal medium-sized aquariums under 19.7″ depth with an air pump ≥ 2W” and calls it “Perfect for shrimp, bettas, fry tanks, nano aquariums, and large tanks for supplemental filtration”. The HG120 manual gives the Medium as Φ2.9 x 6.5 inches; the Amazon listing says 2.9 x 6 inches. hygger says it “Works perfectly during power outages when paired with a battery air pump” (see our power outage guide). hygger’s warranty page gives “3 (2) years from the date of sale if this product was purchased from a hygger®-authorized specialist dealer”; this applies to picks 2, 3, 5 and 6 (pick 4’s seller matches hygger’s list by spelling only). Among Amazon reviews of this listing (size usually not stated), one owner wrote “The bubbles are very large and noisy and the air stone is not attached to the filter itself”, and one received it “broken”.

Maker cautions: “a. Don’t use tap water or hot water to clean the biochemical sponge filter. b.Make sure cleaning the filter with tank water. c. Make sure the sponge filter is onvertically,otherwise the pipe will be blocked by the ceramic pearls. d.Clean the filter with tank water every 2 ~4 weeks e.We recommend replacing the sponge and ceramic pearls every 5~6 months.” The manual also says: “The round hollow tube and bulkheads are one piece;do not separate them to avoid damage.” Two sponges ship fitted; it says to remove one as a spare.

Specs (linked: HG120, Medium)

• Tank: 20-55 gal, under 19.7 in deep; air pump 2 W or more; airline size not published (maker)

hygger HG120, L, Air-driven, 55-125 gal

Evidence: No independent test; maker specs. Source: hygger.

hygger suggests the Large “for 55-125 Gal aquariums under 26.4″ depth with an air pump ≥ 5W” and lists “Large tanks (as auxiliary filtration)” among its uses. The manual gives Φ3.94 x 7 inches; the listing says 3.9 x 6.4 inches. Same design and manual as pick 2.

Maker cautions: “a. Don’t use tap water or hot water to clean the biochemical sponge filter. b.Make sure cleaning the filter with tank water. c. Make sure the sponge filter is onvertically,otherwise the pipe will be blocked by the ceramic pearls. d.Clean the filter with tank water every 2 ~4 weeks e.We recommend replacing the sponge and ceramic pearls every 5~6 months.”

Specs (linked: HG120, Large)

• Tank: 55-125 gal, under 26.4 in deep; air pump 5 W or more (maker)

hygger HG256, S, Twin sponges, 10-40 gal

Evidence: No independent test; maker specs. Source: hygger.

hygger’s HG256 page suggests the small size “for 10 to 40 gallon fish tanks” and says “The water flow is adjustable, small, and slow without disturbing the tank inhabitants.” Its outlet is in “aeration mode” below the surface and “small waterfall mode” above it. The manual lists a 2.5 W air pump, “4mm(0.16 Inch)” air tube and a 100 ml ceramic container for the S, with an airflow valve, two suction cups and a hang-on clip in the box. Before use, it says to rinse the sponges and ceramic pearls “with clean water from tank (Don’t rub)”. This listing names model HG256 and calls it “Upgraded”; our fish tank filter roundup links an older Amazon listing of hygger’s double sponge filter, in size M, that names no model number, so treat the two as one family: we link the S for 10-40 gallons. hygger’s warranty page says products from non-authorized stores “cannot be guaranteed and enjoy a warranty”, and this listing’s seller, AquaFocus, matches its list (“AquaFcous”) by spelling only. Among Amazon reviews of this listing (size not stated), one owner wrote “Easy assembly and set up. I used the hanging bracket to install mine”, another “Worked great at first but too many points of failure”.

Maker cautions: “a. This filter must be connected with applicable size of air pump. b. Don’t use tap water or hot water to clean the biochemical sponge filter. Make sure to clean the filter with tank water. c. This filter must be connected with applicable size of air pump and equipped with a check valve on the air tube to prevent flow-back during power failure. d. Make sure the double sponge filter oriented vertically, otherwise the pipe will be blocked by the ceramic pearls. e. Clean the filter with tank water every 2 ~ 4 weeks. f. We recommend replacing the sponge and ceramic pearls every 5 ~ 6 months.”

Specs (linked: HG256, S)

• Tank: 10-40 gal; air pump 2.5 W; airline 4 mm (maker)

hygger HG176, S, USB pump, small tanks

Evidence: No independent test; maker specs. Source: hygger.

The HG176 manual lists the S as “3 W”, “60GPH (227L/H)” for tanks “< 20 Gal”, while the product page sells it as “S for less than 10 Gal” (its text says “smaller than 20 gallons”); we would follow the smaller figure. The manual says: “THE PACKAGE DOES NOT INCLUDE A DC 5V 1A ADAPTER.” The page lists it as “Applicable to Freshwater Tanks”. Amazon reviews of this listing (size not stated) split: “Great !! Perfect for my nanotank”, “It’s really quiet, but very large. Barely fit in my 5.5 gallon tank”, and “This sponge filter was great — for five days. Then it stopped working”.

Maker cautions: “a. Avoid using tap water or hot water for cleaning; instead, use water from your tank to maintain the beneficial bacteria balance. b. Ensure the sponge filter is positioned vertically to prevent the ceramic ball from blocking the pipe. c. Regularly clean the filter with tank water every 2 to 4 weeks to keep it functioning optimally. d. For best performance, replace the sponge and ceramic ball every 5 to 6 months to maintain filter efficiency.” The manual’s setup step: “Verify that all connections are secure before plugging in the power cord.” The page adds: “If the water flow is significantly weakened or off, the filter sponge should be checked and cleaned immediately.”

Specs (linked: HG176, S)

• Pump: 3 W USB, 60 GPH; tank under 10 gal (size label) or under 20 gal (manual) (maker)

hygger HG176, M, USB pump, larger sibling

Evidence: No independent test; maker specs. Source: hygger.

The manual lists the M at “5 W” and “80GPH (300L/H)” for tanks “< 45 Gal”, with a 2.36 x 5.12 inch sponge; the size label on the page and listing says “M for less than 30 Gal”. Same manual, adapter note and freshwater scope as pick 5.

Maker cautions: “a. Avoid using tap water or hot water for cleaning; instead, use water from your tank to maintain the beneficial bacteria balance. b. Ensure the sponge filter is positioned vertically to prevent the ceramic ball from blocking the pipe. c. Regularly clean the filter with tank water every 2 to 4 weeks to keep it functioning optimally. d. For best performance, replace the sponge and ceramic ball every 5 to 6 months to maintain filter efficiency.”

Specs (linked: HG176, M)

• Pump: 5 W USB, 80 GPH; tank under 30 gal (size label) or under 45 gal (manual) (maker)

AQQA AQ190, S, USB pump, 10-40 gal

Evidence: No independent test; maker specs. Source: AQQA.

The AQ190 manual lists the S at “3W”, “48GPH (180L/H)” and “10-40Gal(38-152L)”, and says the filter “does not require an air pump”. A knob on the head sets how much air it draws in. AQQA’s page says it works “without ever risking tiny creatures getting pulled in” and runs “under 30 dB”; both are AQQA’s claims. The page title says freshwater and saltwater, but the manual says freshwater only, which we follow. AQQA’s product page links this Amazon listing, but the seller, “AQQA Aquarium”, is registered to a different company from the one in AQQA’s manual. The manual’s 2-year warranty applies “if this product was purchased from an AQQA®-authorised specialist dealer”. We found no owner report on this listing in the sources we could read.

Maker cautions: “This filter comes with a built-in water pump and includes a power adapter (no additional purchase required). Keep the USB port waterproof.” “Soak the filter sponge thoroughly with aquarium water before use.” “The water pump must operate underwater to prevent dry running.” “Clean the filter sponge using aquarium water only to preserve nitrifying bacteria.” “This electric filter is an electrical appliance, do not allow minors to operate or use it.” “This filter is designed for freshwater use only; do not use in saltwater.” “The bioceramic balls inside the filter need to be cleaned before use. As the bioceramic balls may retain powder or debris during production or transportation, placing them directly into the aquarium can cause temporary water cloudiness, affect visual clarity and filtration efficiency, and potentially impair fish respiration or clog gills. There are no chemicals harmful to fish.” “Note: Avoid submerging the water outlet too deeply underwater, as excessive water pressure may reduce the oxygenation head’s air intake.” The listing says: “Clean sponge every 2-3 weeks with tank water for best results.”

Specs (linked: AQ190, S, 110V adapter)

• Pump: 3 W, 48 GPH; tank 10-40 gal; freshwater only (maker manual)

Aquatop PowerFlow PSF-1, Built-in pump, 50 GPH

Evidence: No independent test; maker specs. Source: Aquatop.

Aquatop’s page says the PSF-1 is “Designed for nano aquariums, shrimp habitats, quarantine tanks, fry grow-out systems, and other small aquariums”, lists “Flow Rate: 50 GPH” and “Air Pump Required: No”, and gives the tank size only as “Small Aquariums”. It does not list the wattage; the Amazon listing says “2.5 watts”. We found no manual on Aquatop’s page. Aquatop’s warranty covers “up to 1 year from the date of the original purchase through an Authorized Dealer” and names TruAqua, this listing’s seller, as one. We found no owner report on this listing in the sources we could read. Our quarantine guide describes seeding a sponge filter in an established tank first, following the Merck manual.

Maker cautions: “Unplug the filter before servicing. Rinse the sponge using aquarium water during routine maintenance to preserve beneficial bacteria. Avoid rinsing under tap water or replacing the sponge unless necessary. Periodically inspect the pump impeller and intake for debris buildup to maintain optimal performance.”

Specs (linked: PSF-1)

• Pump: built in, 50 GPH; tank “small aquariums” (maker); 2.5 W (listing)

Frequently Asked Questions

We found no independent test of these models. In the r/PlantedTank thread owners named Swiss Tropicals and Aquarium Co-Op, and one wrote that the foam’s quality matters “far more than most other elements of their design”.

Not for every tank, by owners’ accounts (see “Are sponge filters enough filtration?”). Our fish tank filter roundup compares sponge, hang-on-back and canister filters by tank size.

A Fishlore member advising on a tall tank wrote that “A smaller sponge filter will have a smaller diameter lift tube, so it won’t circulate as much water as a bigger sponge”, and that a smaller sponge “might need to be cleaned more frequently”. The makers here size their filters by tank volume, and hygger also by depth.

Owners differ. One r/Aquariums owner wrote that they “provide good bio filtration. But they do an awful job of mechanical filtration I ended up adding HOBs to both tanks”; another wrote: “I personally use a HOB filter and a sponge filter in both of my tanks.” hygger lists large tanks “as auxiliary filtration” for the HG120.

The makers’ ranges include 10 gallons for these: AQQA rates the AQ046 S for 5-20 gallons, and hygger and AQQA rate the HG256 S and AQ190 S for 10-40. hygger labels the HG176 S “less than 10” gallons, though its manual says under 20.

Five picks include 20 gallons in their makers’ ranges: the AQ046 S, HG120 M, HG256 S, HG176 M and AQ190 S. In an r/Aquariums thread about a planted 20-gallon tall tank, an owner who runs Aquarium Co-Op sponge filters wrote: “I personally use a HOB filter and a sponge filter in both of my tanks. I’m sure that just one medium sponge filter would probably be plenty for your setup, I always tend to over-filter my tanks because I tend to overfeed a little bit, and having both works best for me.”

Each maker here lists bettas or betta tanks. One r/Aquariums owner wrote: “Sponge filters are also perfect for low flow species like Bettas.” Flow can still be too strong: in a 2022 r/bettafish thread, before this HG256 listing appeared, an owner wrote: “I just got the hygger double sponge and I don’t like the flow, it’s too strong” (size not named). An air control valve on the line turns an air-driven filter down, as our filter current guide explains.

Owners name weak mechanical filtration, space on the substrate and air pump noise. One wrote: “Downside is they’re not all that much help with mechanical filtration and take up space on the substrate.”

The bottom line

Final Verdict

Air-driven: AQQA AQ046, S (check price) (5-20 gallons), hygger HG120, M (check price) (20-55), hygger HG120, L (check price) (55-125) and hygger HG256, S (check price) (twin sponges). No air pump: hygger HG176, S (check price), hygger HG176, M (check price), AQQA AQ190, S (check price) and Aquatop PowerFlow PSF-1 (check price).

More guides: air pumps, betta tanks, filter current, cleaning a filter.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.