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20 Gallon Fish Tank Filter up to 55 Gallons | Quiet Fish Tank Filter | Crystal Clear Water | Turtle Tank Filter | Submersible Aquarium Filter, Filter for Fish Tank, 50 Gallon Fish Tank Filter

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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon

Arrives Sep 23 – Sep 24
Order within 17 hours and 45 minutes
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Size: 20 to 55 Gallons


Features

  • CRYSTAL CLEAR WATER Unlike other fish tank filters on the market, the Atlantis Aqua submersible aquarium filter draws water through the bottom of the filter, rather than the sides. This means the water travels through the full fish filters system rather than taking the easiest path and being partially filtered, like other fish filters.
  • NO NEED TO CHANGE FILTER PADS The filter sponges last a lifetime, so no need for expensive monthly replacements! Can be used as a Turtle Filter. Detachable sections so it can be used as a fish tank filters 20 gallon - 55 gallons and can be used in a goldfish, tropical or saltwater tank.
  • HEALTHIER FISH The internal aquarium filter oxygenates the water which is vital to the health of your pets - they also enjoy swimming in the waves!
  • ALL-IN-ONE FILTRATION SYSTEM Our aquarium filter includes a sponge filter and a biological filter. The filter is 11.4" tall and 2.75" wide but it can be used with one section removed and is 7.6" tall.
  • MANCHESTER BASED DESIGNER We are a Manchester based company that is passionate about providing high quality products whilst offering the best customer service. All of our products come with a 1-year warranty. This filter is not suitable for small shrimp or infant fish.

Package Dimensions ‏ : ‎ 11.81 x 4.84 x 3.58 inches; 2.07 Pounds


Item model number ‏ : ‎ Aqua-100


Date First Available ‏ : ‎ December 26, 2022


Manufacturer ‏ : ‎ Atlantis Aqua


Best Sellers Rank: #11,573 in Pet Supplies (See Top 100 in Pet Supplies) #164 in Aquarium Filter Accessories


#164 in Aquarium Filter Accessories:


Customer Reviews: 4.3 4.3 out of 5 stars 591 ratings


Item Weight: 2.07 pounds


Manufacturer: Atlantis Aqua


Item model number: Aqua-100


Date First Available: December 26, 2022


Item Package Dimensions L x W x H: 11.81 x 4.84 x 3.58 inches


Brand Name: Atlantis Aqua


Target Audience Keyword: fish


Directions: Add the submersible aquarium filter into the fish tank before plugging in. The fish filter is suitable for 20 gallon fish tanks, 40 gallon, 50 gallon, and every size up to 100 gallon tanks. The filter is sealed on the sides which forces the water through the bottom of the filter resulting in crystal clear water.


Warranty Description: 1 year


Model Name: Aqua-55


Color: Black


Size: 20 to 55 Gallons


Age Range Description: All Life Stages


Included Components: Filter, Filter Sponges, Filter Bio-Balls and Manual


Specific Uses for Product: Active


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 23 – Sep 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • I needed this filter in my life
Size: 20 to 55 Gallons
I bought this filter for my 20-gallon fish tank, and it has worked perfectly! The water stays crystal clear, and I’ve noticed a big improvement in how clean and fresh the tank looks. It runs very quietly, which is a huge plus since the tank is in my living room.The setup was quick and simple, and the filter is easy to maintain. I only have to rinse and replace the cartridges when needed, and it keeps the water quality great for my fish.o, it’s reliable, efficient, and affordable. If you’re looking for a quiet filter that does the job and keeps your fish happy and healthy, this is definitely a great choice. ... show more
Reviewed in the United States on August 20, 2025 by Daylis

  • Must have!!!
Size: 55 to 100 Gallons
I am SO pleased with this filter. I’ve had aquariums for 30+ years and this is the best filter I’ve found. Easy to assemble. Quiet. The water in the tank doesn’t evaporate as quickly as with an above water filter. This is a particular must have for eel owners. My zig zag eel was an escape artist (typical eel behavior) and would constantly swim into above water filter. That problem is now gone. Filter has been installed for a little over a month and no issues When I received this item from Amazon it was missing a couple of pieces. I reached out to the company via email and they immediate replied and sent out a replacement. ... show more
Reviewed in the United States on July 11, 2025 by Jennifer Ohlson

  • Perfect filter tbh!!
Size: 55 to 100 Gallons
I am so happy!! Ihave never bought a filter like this and was nervous, however it works SO good!! It’s powerful output definitely pushing the water around and does its job!! Seller went above and beyond for me!! Surprisingly my filter came with some missing parts, instead of just sending missing parts, I was sent a whole new package. I am so happy thank you so much!!! ... show more
Reviewed in the United States on August 22, 2025 by Sally bones

  • Filter replaced and working
Size: 55 to 100 Gallons
UPDATE: Customer service reached out to me to inquire about what specifically was wrong with my unit. I was having issues with the propeller. A replacement filter was provided and so far working great. I appreciate the quick response as my turtle is extra messy this time of year. I will update if anything changes, though I feel fairly confident it will keep working this time. ORIGINAL: I was originally impressed with the filter. Was pretty quiet and easy to put together. I cleaned it and saw that it had caught a lot. However, it has stopped working since its first cleaning. This isn't my first filter. I try to be careful when cleaning. Not sure why it stopped working. But now my tank is dirty again so quickly and I'm filterless. ... show more
Reviewed in the United States on May 15, 2025 by Amazon Customer

  • small, silent, cheap, effective, easy to understand instructions. I'm a fan!
Size: 55 to 100 Gallons
I am so impressed with this filter! Let's just start with the fact that the instructions were well written by someone who is (I would guess) a native English speaker. I put the filter into a very, very murky tank. It had been murky for a long time. Within two days of installing this filter, the water really was clear. The filter is smaller and cheaper than many of the other filters I have used for big tanks, and the aeration option is nice too (the aeration does make some noise, though.) I am genuinely impressed! ... show more
Reviewed in the United States on June 6, 2025 by G

  • Healthy results!
Size: 20 to 55 Gallons
AMAZING! It cleared my tank within a few hours...better results than what I was expecting! It was easy to add the balls and to install. Healthy living for my fish.
Reviewed in the United States on August 16, 2025 by Nancy Carter Nancy Carter

  • Awsome filter backed up by the best people
Size: 55 to 100 Gallons
Got this for my 55 gallon Molly, platty party tank. It’s supper quiet and moves a ton of water. Had to turn it down so my fish could swim right. The only problem I had was it came missing parts but all I had to do was send a email and they replaced the whole thing and didn’t make me mil back the old one. The new one came in a day from my emails. This is a Awsome product backed by a Awsome team. Will always chose this company in the future. ... show more
Reviewed in the United States on August 11, 2025 by Stephen Alfaro Stephen Alfaro

  • Different Filter design
Size: 55 to 100 Gallons
Was a mystery how water could circulate thru the media, but finally got it! Easy to assemble, and now my aquarium is crystal clear. My fish look healthier. Very innovative design. Good job!
Reviewed in the United States on September 15, 2025 by Bearsy

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