Pawfly Aquarium Corner Sponge Filter Quiet Small Fish Bio Foam Filter with Natural Stones Gravels and Ceramic Rings for Betta Fry Shrimp Fish Tanks up to 50 Gallons (Air Pump Not Included)
$9.99
Price: $9.99
(as of Oct 27, 2025 11:26:42 UTC – Details)
Product description
Pawfly specializes in all must-haves of aquarium accessories such as air pumps, air stones, sponge filters, fish nets, cleaning brushes and other accessories to set up your aquariums.
Sponge Filter for 50 Gal Tanks
With 6-layer fine sponges, lots of gravels and ceramic rings to clear up impurities and promote air diffusion, it provides effective filtration and brings higher dissolved oxygen rate to keep water clean and healthy.
It features fine cleaning effect, quietness and easy maintenance. Ideal for aeration in 20 to 50 gallon fish tanks. Fit for shrimp, fry and various ornamental fish like betta, discus, guppy and goldfish.
Large size: 3.1″ R x 6″ H Up to 50 gallon tanks Multi-layer fine sponge Natural gravels & ceramic rings 2 storeys for dual filtration Quiet & easy to be cleaned Make tanks crystal clear
Soft Fine Sponges
6-layersoft sponge material has high air/water permeability. The sponge sequence can be changed to meet your preference.
Gravels & Ceramic Rings
Effectively absorb harmful substances and cultivate beneficial microorganisms. They can be replaced with your customized materials.
Up to 50 Gallons
Large size – 3.1 inches in radius and 6 inches in height. Work great in 20 to 50 gallon fish tanks or aquariums.
Two-storey Design
Provide dual filtration for water going through the 2 storeys. They are separable and fit nicely in the corner to make way for tank layout.
Air Powered
The air chamber produces tiny bubbles which greatly increase the oxygen solubility of water. Air Pump Not Included.
Easy to Clean
Detachable design allows you to easily take it apart for cleaning or replacement. Rinse and squeeze the sponges with aquarium water ONLY.
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Customer Reviews
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4.6 out of 5 stars 1,621
4.3 out of 5 stars 547
4.3 out of 5 stars 547
4.3 out of 5 stars 547
Price
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$6.49$6.49 $5.99$5.99 $7.98$7.98 $9.99$9.99
Size
1.5″ x 3″ 2.7″ x 6.3″ 3.3″ x 4.9″ 3.1″ x 3.3″ 3.1″ x 6″
Weight
1.1 oz 5.2 oz 3 oz 8 oz 14.6 oz
Quantity
1 Pack 1 Pack 1 Pack 1 Pack 1 Pack
Application
1-3 gallon small tank 10 – 30 gallon tanks 5-10 gallon small tank 10 – 30 gallon tanks 20 – 50 gallon tanks
Features
With hose & valve accessories Make tank crystal clear Fits in corner nicely Multi-layer fine sponge Natural gravels & ceramic rings
Package Dimensions : 7.13 x 3.46 x 3.43 inches; 14.89 ounces
Date First Available : March 24, 2023
Manufacturer : Pawfly
ASIN : B0BZH7THPN
Best Sellers Rank: #10,473 in Pet Supplies (See Top 100 in Pet Supplies) #34 in Aquarium Filters
Customer Reviews: 4.3 4.3 out of 5 stars 547 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Multi-layer Fine Sponge: Provide mechanical and biological filtration and trap debris or wastes without sucking up your fish. Keep fish tanks crystal clear and healthy.
Further Cleaning: The gravels inside absorb excess damaging substances and release trace elements. And the ceramic rings can cultivate beneficial substances. Always keep water fresh.
For 50 Gal Tanks: Measure 3.1″ R x 6″ H. Fit for 20-50 gallon fish tanks. You can change the sponge sequence at will and customize the filter materials according to the breeding density of the fish.
Quiet Aeration: Air powered and cause no disturbance to your daily life. The wide duck-billed air outlet port brings more bubbles to promote oxygen circulation.
Easy to Clean: The filter can be easily detached for cleaning. Rinse the sponges every 2 to 4 weeks with aquarium water ONLY. Avoid soaking or washing them in tap water! Replace the white sponge every 2-3 months!
Customers say
Customers find the aquarium filter works well, with one mentioning it functions effectively in a 20-gallon fresh water tank. They appreciate its quality, ease of assembly, and value for money, noting it’s easy to set up and keeps tanks clean. The filter receives positive feedback for its low noise level. Durability receives mixed reviews, with several customers reporting that the product is easily broken.
13 reviews for Pawfly Aquarium Corner Sponge Filter Quiet Small Fish Bio Foam Filter with Natural Stones Gravels and Ceramic Rings for Betta Fry Shrimp Fish Tanks up to 50 Gallons (Air Pump Not Included)
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Chance Horetz –
Exceeded all expectations.
This actually has exceeded all my expectations and has worked way better than expected. I have not had to take it out to clean it. It keeps my tank clean and fits into the corner perfectly. What more could you ask for in a simple filter? I am definitely satisfied.And I would definitely recommend this two others and already have recommended it to others! Definitely worth it! And as far as filters go, it looks great in the corner, behind some plants! And it is extremely durable.
Wendy J –
Nice little filter
I use this to supplement a hang on back filter and it works well to keep the water clear.
Jordan Milton –
Good pump works as intended
Works well, as intended. Only issue is that if you get an algae bloom or the rocks fill with debris otherwise, good luck cleaning it to make it appear nice and prim and proper again. Recommend for a heavy planted aquarium or hidden behind tall plant decor. Noise level – none from this, it’s from your air pump that makes noise. Ease of assembly – just dunk in dechlorinated water, stick your airtube on, and good to go. Ease of disassembly for cleaning, not so much. Size – Good for a 5g, 10g, or 20g aquarium. I’d use 2 or more for 30g and wouldn’t use for larger aquariums. I like that it easily fits into a corner instead of sticking on the back wall kind of haphazardly. Durability – it’s a plastic container with filtration media, no internal pumps or mechanics, and if your fish can break it I’d be concerned. Don’t put it in with mantis shrimp or oscars and jack dempseys and you should be good to go. Mine was for my betta and now for my frogs. I rebought it for my nursery tank. It doesn’t disturb the surface water at all, while providing oxygen to plants and aquatic pets. Depending on your air pump size ratio to your tank. It’ll put out as much air as you give it. Nozzle raises up to be high or low. That’s a good bonus as well. You can make varying levels of bubble sources that way.
Apexwolf –
Amazing filter
Amazing filter , I purchased this for a fluval tank with loaches and frogs , but current was to much for the frogs . So I added it into my already cycled 40 gallon tank for extra oxygen withy community tank . It works well as you can see in video the power behind it definitely recommend . It is light weight and no noise . Very easy to assemble , however for first min or two you need hold it under so it doesn’t float around while weight from water enters and exits
Jarred G Schacher –
Works great
Low profile works great for my betta
Christian –
Filter Pads replacements not recommended
Filter pads replacement are not as described and they are not as shown in the pictures. They are quite thin compared with the original ones… So thin that they look like paper filters. Don’t waste your money with these replacement filters. Totally disappointed.
Love it thanks –
Ready in 3 min
Easy set up comes asembeld
chiara paleari –
use for no more than 3 fish
dose not give enough air for more then 5 fish
Elijah M.D. –
I donât have many negatives to say about this sponge filter. It works very well with my air pump and quickly cleared the dust from my cycling aquarium after first adding Fluval Stratum (stratum heavily mucks up the water at first, like the water was black). The sponge provides lots of surface area for beneficial bacteria to colonize, and my bladder snail babies seem to love grazing on and around it, Iâm sure my future shrimp will too. The shape is pretty unique which is great for keeping in a corner. My only minor complaint and the reason for losing a star is that you need to do a DIY minor modification if you want to use an air stone inside, which I wish was built in from the start. If you donât use an air stone you risk having your sponge filter sound like a witches brew or something rather than light bubbling.(The white bag on top of it in my photo is just a small media bag full of crushed oyster shells Iâm using for raising KH)
Erin –
Works great, fits nicely in the corner of my aquarium. I have a 3 gallon and it moves the water around as it should. I’m just starting the aquarium so can’t speak completely for it’s filtering abilities yet, but I will be updating this review in a couple months when the aquarium is working better. Weighted so it stays at the bottom. Pretty much seems the same as your regular sponge filter, just quartered
THRobinson –
Just got this, will update how well it works after a week. Will say it has some good weight to it, was expecting a hollow plastic base but it has weights inside. Planning the airstone mod, and my Nicrew mini air pump came with a 25mm stone, but you will need something under 20mm to fit. 20mm would be a tight squeeze. I’d aim for 18mm at most.Bought this for the corner of a 5.5gal tank, that had a nice hanging pump that came with it, but I have Celestial Danios, and I started to notice babies that are insanely small, so, switching to this.
Al –
It floats for awhile, make sure to squeeze all the air bubbles out of it and a couple rocks around the base keeps it in place. Works well and can see the filtration working within a few days. Note it doesn’t come with any attachments or pump.
Mainducks –
For my small tank, it always needed more filteration than usual, these little corner filters help keep the tank circulation airation etc better, if I get a bigger tank I’ll use 2 more for all 4 corners.