Contents

The Best Undergravel Filter 5 Gallon of 2023 – Reviewed and Top Rated

2,083 Reviews Scanned

Rank No. #1

Lee's 5-1/2 Original Undergravel Filter, 7-1/2-Inch by 15-Inch

Made of special quality plastic which resists splitting and cracking
Also has optional flow-thru set-up for use with a power head
Size: 7 1/2-inch by 15-inch

Rank No. #2

Lee's 2-1/2 Original Undergravel Filter, 6-Inch by 12-Inch

Made of special quality plastic which resists splitting and cracking
Also has optional flow-thru set-up for use with a power head
Size: 6-inch by 12-inch

Rank No. #3

CORISRX BEST OF YOUR LIFESTYLE Under Gravel Filter 7.8"x5.5" Undergravel Filteration for Fish Tank Air Pump

To maintain the cleanliness of your aquarium, it is important to circulate the water beneath the gravel layer. Our Flow Undergravel Filter is specifically designed as a biological filtration system for both freshwater and saltwater aquariums.
The pipe diameter is suitable for use with various types of filters, submersible pumps, or external filters. It provides versatility and compatibility with different equipment.
Included in the package is one Undergravel Filter measuring 19.9x14cm (7.8"x5.5").
This filter effectively utilizes the gravel bed, providing a large surface area for Nitrobacteria to thrive and contribute to water clarity.
By utilizing our Undergravel Filter, you can enjoy a clean and well-maintained aquarium environment.

SaleRank No. #4

Lee's 5-1/2 Premium Undergravel Filter, 8-Inch by 16-Inch

The larger plate sizes reduce the number of plates required
The added strength of the UGF plates makes this filter most preferred by saltwater aquarists
Size: 8-inch by 16-inch

SaleRank No. #5

CORISRX BEST OF YOUR LIFESTYLE Aquarium Undergravel Filteration Bottom Circular Bar (S) Fish Tank Under Gravel Filter Tube

connector 12mm
Pipe diameter 16mm
Circular bar tube is 16.6cm , Total 3 tubes
PVC tube is 16.6cm , Total 1 tube
Connector L Shape Joint , Total 5 pce

SaleRank No. #6

Lee's Pet Products ALE13200 Undergravel Fishbowl Filter, 1-Gallon

Lees under gravel fishbowl filter 1galoon
Minimizes maintenance responsibility
Comes with plant and carbon cartridge included

Rank No. #7

Penn-Plax Undergravel Aquarium Filter for 10 Gallon Tanks – Two 9.5” x 9.5” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts, making for simplistic and easy maintenance. This filter is suitable for most 10 gallon aquariums.
BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system. It’s a filter and bubbler in 1.
ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
MEASUREMENTS: Each Filter Plate Separately = 9.5 (W) x 9.5 (D) / Filter Plates Together = 19 (W) x 9.5 (D) / Each Lift Tube at Filter Plate Base = 9.75 – 12.75

Rank No. #8

CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8" X 5.9" Fish Tank Under Gravel Filter

Circulate the water under gravel layer in order to reduce the corruption of gravel.
The gravel bed provides tremendous surface area for Nitrobacteria and keeps your water crystal clear.
The filter plate can be connected with air pump, filter pump, submersible power head and hang-on filter to increase the circulation and help with mechanical and chemical filtration.
Adjustable lift tube can be modified at your desire height. Silence design tube head can reduce noise.
Air stones will not stock or collapse. Works freshwater and saltwater tanks

Rank No. #9

Penn-Plax Cascade 20 Power Filter – Mini Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups, (Model: CPF6)

QUIET & EFFICIENT: The Cascade 20 Mini Power Hang-On Filter quietly delivers crystal clear water throughout the aquarium. This filter pushes water at 20 Gallons per Hour (GPH) for tanks up to 7 Gallons in size. It’s great for Freshwater and Saltwater aquariums.
ACCOMMODATING: The adjustable flow knob allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. The hang-on design is constructed for safe mounting. With a provided extension piece, the lift tube measures between 5” (min) and 6 1/2” (max).
EXTREMELY BENEFICIAL: This Cascade filter utilizes disposable, double-sided media cartridges that contain Activated Carbon and Poly Fiber Floss. The included cartridge traps floating particulate matter, removes harmful chemicals and toxins, clears up discolorations, and reduces foul odors from your aquarium’s water.
OVERALL MEASUREMENTS: 4. 5” (H) x 3. 75” (W) x 3” (D)
SHOP PENN-PLAX FOR ALL YOUR PET’S NEEDS: Penn-Plax is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.

Rank No. #10

Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter (UGF) – Freshwater and Saltwater Safe – Suitable for 15 – 20 Gallon Tanks

NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 15 – 20 (high) gallon aquariums.
BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system! It’s a filter and bubbler in 1!
ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
MEASUREMENTS: Each Filter Plate Separately = 11.25” (W) x 11.2” (D) / Filter Plates Together = 22.5” (W) x 11.2” (D) / Each Lift Tube at Filter Plate Base = 12” – 15”

Rank No. #11

EmmaWu Mini Aquarium Filter Internal Submersible Fish Turtle Tank Filter (60 GPH)

Notes: Must place the pump head UNDER the water level to prevent overheat of pump.
Ultra Quiet: Running with very low noise, good for room tanks.
Wide Applications: Suitable for marine and freshwater aquariums. The filter could be lift up or laid down, which could be used in fish tank or low water level turtle tank.
Compact Design: Save Room for Small Aquarium and Fish Tank, Leave more room for fish.
Dimension: 1.4*1*4 Inch (L*W*H)

Rank No. #12

Penn-Plax Small World Fishbowl Under-Gravel Filter Kit – Comes with a Disposable Media Cartridge, Air Pump, Air Tubing, and Air Stone, Multicolor (EPSWF2)

ADJUSTABLE FILTER: The Small World Fishbowl Under-Gravel Filter Kit is specifically designed for all drum or round bowls with a 4” or larger opening. If filter plate does not fit through the opening, you can break away the outer ring from between 2nd and 3rd levels, allowing for a better adjustments.
AIR-TECH PUMP: This Kit comes standard with an Air-Tech AT2K0 pump. In addition to being quiet, efficient, and reliable, this air pump is built with a strong motor that’s made to last. With silicone polymer flappers, a thick cover, and raised rubber feet, this pump will remain in place.
TOP-QUALITY CARBON: Supercharged with scientifically formulated Carbon, the media cartridge in this kit absorbs ammonia, nitrites, nitrates, and phosphates in a fast and timely manner, along with removing harmful chemicals and toxins, clearing up discolorations, and reducing foul odors from your fishbowl.
BIO FLOSS: In addition to the Carbon, the included media cartridge also contains Bio Floss for physical filtration of larger particulate matter, and biological filtration that optimizes the colonization of anaerobic bacteria.
COMES WITH EVERYTHING YOU NEED: This Kit comes with an Air Pump, Air Tubing, Under-Gravel Filter with Adjustable Base, a Disposable Filter Media Cartridge, an Air Stone, and an Adjustable Flow Valve.

SaleRank No. #13

AQUANEAT 3 Pack Aquarium Bio Sponge Filter Breeding Fry Betta Shrimp Nano Fish Tank (Small up to 10Gal)

Sponge filter provide both mechanical and bio filtration, also, the air infusion chamber produces minute bubbles which increase the oxygen solubility
Safe for fish: soft sponge material, traps floating debris and won't suck up your fish
Easy to set up & clean: simply install an airline into the unit and turn on the air pump, simply rinse and squeeze sponge in tank water
Recommend tank size: up to 10 gallon, excellent for small size fish like betta, dwarf cichlid, guppy, killifish etc., or for hatcheries, maternity tanks, nano tanks and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter
Includes: 3 pcs of sponge filter. Dimension: 2.0"D X 4.75"H

SaleRank No. #14

Penn-Plax Small World Aquarium Filter – Comes with a Disposable Media Cartridge (Bio Sponge, Carbon, and Zeolite Crystals) – Safe for Freshwater and Saltwater Setups (SWF1)

GREAT FOR SMALLER SETUPS: The Small World Filter is specifically designed for aquariums and tanks up to 5 gallons. In addition to our Small World, New World, and Betta World habitats, this filter is compatible with other tanks in the market. It fits all shapes and sizes, and also mounts securely to glass, acrylic, and plastic surfaces.
BIO SPONGE: In addition to the Carbon and Zeolite Crystals, the included media cartridge also contains a Bio Sponge for physical filtration of larger particulate matter, and biological filtration that optimizes the colonization of anaerobic bacteria.
CARBON & ZEOLITE MIXTURE: Supercharged with scientifically formulated Carbon and Zeolite Crystals, the media cartridge in this kit absorbs ammonia, nitrites, nitrates, and phosphates in a fast and timely manner, along with removing harmful chemicals and toxins, clearing up discolorations, and reducing foul odors from your aquarium, tank, or habitat.
CLEANING & MAINTENANCE: Before placing into your aquarium, tank, or habitat, please briefly rinse the filtration unit with warm water in order to remove Carbon or Zeolite dust. If not done before installation, the water could initially become dark or cloudy.
PLEASE NOTE: The Small World Filter (SWF1), does not come with Air Tubing or an Air Pump, which are Sold Separately. This Aquarium Filter comes with a Mounting Bracket w/ Suction Cups for strong and secure placement, a Disposable Media Cartridge, and a Connector that allows easy connection to standard size air tubing.

Rank No. #15

UPETTOOLS Mini Aquarium Sponge Filter，Small Internal Fish Tank Filter Sui for 2-6 Gallon Tank

【Purchase Note】This fish tank filter need connect Air pump and Air tube,you need have to buy separately!
【Special desgin】Ultra-Thin,Small size, not take up space in fish tank,Compatible air pump wattage >1W （no include Pump）
【Main function】Provide Oxygen, Biological filtration and Purified water quality.
【Easy disassembled】Please wash this filter sponge regular ,creates a clear healthy home for your fish.
【Additional】please use this aquarium filter with air pump,if you have any install question, please feel free to contact us.

Rank No. #16

AQUANEAT Sponge Filter, Aquarium Air Driven Bio Corner Filter Sponge for Fry Shrimp Nano Fish Tank (Small)

Corner filter provide both mechanical and bio filtration, and supplying the water with much needed oxygen; Reduces noise from air pump and consumes lowest wattage
Easy to set up & clean: simply install an airline into the unit and just turn on the air pump; Open the box and simply rinse and squeeze in tank water
Safe for fish:excellent for small size fish like dwarf cichlid, guppy, killifish etc., or for hatcheries, maternity tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter
Dimension：4"L x 3.125"W x 3.25" to 6"H; Recommend tank size: up to 20 gallon
Includes: one box filter included media as shown in picture

Rank No. #17

UPETTOOLS Aquarium Biochemical Sponge Filter with Air Stone Ultra-Thin Round Air Driven Clearable Bio Quiet Filter Sponge for Shrimp Nano Fish Tank

Multi-filtration Functions：Provide both mechanical and biological filtration, and supplying the water with much needed oxygen ,reduces noise from air pump and keeps water cycled and clear.
Equipped with small air stone: This aquarium air bubble supply the water with much needed oxygen quietly. Refining bubble will be a scenery for your aquarium as well.
Easy to set up and disassembled: Simply install an airline into the biochemical sponge filter and turn on the air pump, This filter can be disassembled to clean the sponge and bio ball regularly.
Wide Application：Safe for fish, Suitable for shrimp tank, betta tank, breeder tank, goldfish, discus, guppies, fry, baby fish or other fish.
Innovative ultra-thin design: Save space inside the aquarium tank, more beautiful.Recommend tank size: 3-7 gallon,Dimension: 2.8 * 3.2 in

SaleRank No. #18

NICREW Aquarium Internal Filter, Submersible Power Filter with Multiple Function for Fish Tanks 5-10 Gallon, 53 GPH, 5W

Provides effective and thorough biological and chemical filtration, creating superior aquarium water environment
Activated carbon and fine filter foam trap debris and fish waste, absorb odors
Enable to generate abundant air bubbles and water flow, optimal for oxygen supplement and water circulation of aquarium
Equipped with adjustable air regulator that distributes a gentle flow of water, making it safe for delicate fish or shrimp
Quickly assembles and disassembles, comes with four suction cups for secure in-tank installation, suitable for both freshwater and saltwater tanks

Rank No. #19

AQQA Aquarium Sponge Filter Submersible Fish Tank Filter Ultra Quiet Aeration Bio Sponge Corner Filter for Breeding Fry Betta Shrimp Fish Tank (Small for 5-20 Gallon)

【Ultra Quiet Submersible Filter】 AQQA Aquarium Sponge Filter is air-powered and ultra-quiet, providing efficient filtration without disturbing your fish; (Air pump and air hose are not included in the package) Please prepare a suitable air pump for this filter according to your tank size.
【Mechanical and Biological Filtration】 The sponge filter provides mechanical filtration, the vertical pattern design increases the filtering area and helps to filter efficiently; Bio ceramic media balls provide biological filtration, it helps with decomposing harmful substances and cultivating beneficial nitrifying bacterial at the same time.
【Replaceable Filter Media】 The filter sponge and bio ceramic media balls are both replaceable. You can easily remove the sponge from the filter for cleaning or replacement. (2 sponges in the package in total) The bio cermaic balls are also washable and reusable, or you can change them with other filter media as you demand.
【Multi-functional Aquarium Filter】 The fish tank sponge filter combines filtration, aeration and water circulation in one, helping to keep your fish tank crystal clean and provide an excellent living environment for your aquarium inhabitants.
【Wide Application】 AQQA sponge filter can work great in breeding fry tank, shrimp and betta fish tank, freshwater and marine tank. Small filter is suitable for 5-20 gallon tank, medium filter is suitable for 20-110 gallon tank. Please squeeze the sponge repeatedly until the sponge is full of water, so that the filter can sink on the bottom of the aquarium.

Rank No. #20

hygger Aquarium Corner Filter 85GPH for 1~8 Gallon Fish Tank Bio & Sponge 3-Stage Filtration System with Aeration, Adjustable Flow Submersible Internal Power Filter

【Three Water Filter Ways】①filtration and clear water: provides 2 types of water outlets, a spray bar outlet and flat nozzle outlet that enable ample water movement and aerate tank water. ②Included an air hose to the outside, which works great add oxygen to the water and makes a fantastic wave circulatory effect for the water.
【Triangle Design Space-Saving】hygger in-tank filter is a compact size 1.96"W x 7"H, which fits perfectly on placing the filter in a corner with suction cups make it easy to hide behind aquarium plants or decoration.
【Energy-Saving Fish Tank Filter】Using low-noise 4.5 watt pump, max flow rate up to 85 GPH，which can be adjust water flow through the top flow knob. The output arm can move in different directions thus creating a nice flow wherever it is required.
【Triple Filtration System】Composed of activated carbon cartridge, filter sponge and ceramic rings. Effectively to filter larger to small particles and debris ,absorb odors，for beneficial stuff to grow on, keeps water clear and the inhabitants healthy and happy.
【Simple Disassembly and Easy Cleaning】This filter is effortless to set up, small, it can be used on 1~8 gallons small fish tanks. Take apart to rinse clean and has a reusable media, making regular maintenance a snap.

Last update on 2023-08-01 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What should you do with an undergravel filter?

A: Undergravel filters are perhaps the cheapest types of filters you can find. They’re easy to set up , do a surprisingly solid job and are especially good for smaller fish tanks. You should definitely use an undergravel filter if your tank is undemanding – whether it’s a breeding tank, a quarantine tank, or just a simple Betta fish tank.

Q: What is a good filter for a 5 gallon tank?

A: Generally speaking, HOB (hang on back filters) are the best filter you can have in a 5 gallon tank. They allow more space in your tank while not being as expensive as canister filters. (however, they’re also not as effective as canister filters.)

Q: Are Undergravel filters good in aquariums?

A: Undergravel filters are generally not recommended as the sole source of filtration in an aquarium. This type of filter can be beneficial, however, as a supplemental source of biological filtration.

Q: How does undergravel filtration work?

A: Using an undergravel filter (UGF) is a tried and true method of filtering the water in a fish tank or aquarium. Undergravel filters work by pulling water and impurities downward through the gravel at the bottom of the tank. Rather than relying on a filter to clean the water,…