Best Undergravel Filter: Premium Under Gravel Filter System


Enjoy the top undergravel aquarium filters with our best premium under gravel filter sytem selection.

Our Premium Undergravel Filter Recommendation

Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon...
4,384 Reviews
Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon...
  • Undergravel filter system includes 4 filter plates (each measuring 11.5" X 11.5") with extra large 1 inch...
  • Filter is suitable for most 40 and 50 gallon aquariums. Clips to hold each section securely together are included.
  • 2 carbon filter cartridges remove odors, and water discoloration by trapping the pollutants in the pores of the...

Are you looking for a reliable undergravel filter for your tank?

Do you want a safe and efficient way to clean your aquarium without disturbing your pets?

Do you think undergravel filters would be a great addition to your tank but have no idea what the best products are in the pets market?

If you wish to get an aquarium, you must also plan on keeping it clean. Most aquariums do not have self cleaning mechanism, hence you will need to turn to these filters for this job

Reports indicate that these filters are quite effective in cleaning the water and keeping the pets safe. While there is some controversy surrounding these products, these under gravel filter systems are good in our book due to a number of reasons.

These undergravel filters contain a filter plate that lets water flow freely under the gravel, which blocks both small and large particles of waste and dirt. The gravel acts as a biological and mechanical filter, and keeps the water clean and free of any contamination.

There are many under gravel filter systems out there, but not all are the same. Regardless of the controversy, these types of filters last for years and require no maintenance, except for regularly cleaning the gravel. However, many of these under gravel filter systems do not come with a lift tube and air pump, which you might have to buy separately. Moreover, some of these types of filters have carbon cartridges that may affect performance. So, place the controversy aside, and enjoy our list! No need to delay any further…

5 Great Premium Undergravel Filters For Sale Online

Undergravel Filter #1:

Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon...

The Penn Plax Undergravel Filter  is one of the best undergravel filters suitable for a 40-50 gallon tank. This premium undergravel filter makes it easy for you to clean the water as it is composed of 4 plates that do the cleaning job. The filter mainly performs biological filtration to get rid of dirt particles and that too with no maintenance at all.

Beside dirt particles, tanks can sometimes get filled with chemicals and bad odour which can affect the health of the pets inside and also destroy the look of the aquarium. To provide solution to this problem, this undergravel filter has 2 carbon filters whose job is to clean the chemicals found in the tank and keep the pets out of danger.

The Penn Plax Undergravel Filter also has a special function that allows you to adjust the height of the water level by adjusting the 1” jumbo lift tube in the filter.

This under gravel filter system is extremely easy to set up in your aquarium and will give you no trouble. However, you have to buy an air pump for it and a power overhead as well if you wish to increase the amount of oxygen for your pets inside the fish tank.

Remember that this under gravel filter system can break easily, so make sure you are very careful during the installation.


  • Water level can be adjusted via life tube.
  • Doesn’t affect the aesthetics of the tank as it hides from the view once covered in gravel.


  • Not very durable.

Undergravel Filter #2:

uxcell Plastic Fish Tank Undergravel Filter Board Air Pump Hose...

This undergravel product  is made up of 24 assembled pieces and can easily fit in your tank. The bottom plates of this premium undergravel filter can be connected according to the size of the tank.

The filter set up is extremely easy and since the plastic cells are nicely crafted into tiny squared shapes, unwanted particles are easily trapped into them and the water is kept clean.

There’s a long tube and an air hose to promote good aeration in the tank. Overall, this filter is a great product that works like a charm. However, there’s one flaw in it, the filter tube isn’t much durable and might not stretch a lot in case you have a higher level of water in the tank.


  • No maintenance.
  • Easy set up.
  • Cheaper.


  • The filter tube is not of good quality and also does not stretch much.

Undergravel Filter #3:

Under Gravel Filter 7.8'x5.5' Undergravel Filteration for Fish...

This Under Gravel Filter 7.8"x5.5" Undergravel Filteration for Fish...  is suitable for both saltwater and freshwater tanks. There is however a limit for adding the gravel on this under gravel filter system which should be around 1 to 2 inches and it also needs to be thoroughly rinsed before being added to the tank. This premium undergravel filter is a perfect fit for compact fish tanks where oxygenation can be a problem as the air pump is especially designed to circulate aeration throughout the fish tank. Moreover, the pipe that accompanies the filter can be easily fitted with any outer filter or submersible filter to have good filtration in the tank. The flaw of this premium undergravel filter is that the tube doesn’t fit properly and constantly keeps on moving which can look a bit odd to the viewer.


  • This premium undergravel filter is perfect for both salt and fresh water.
  • Aids in aeration.


  • Only suitable for tanks that are smaller.

Undergravel Filter #4:

Angels Aquatics & Pet Supplies Hexagon Aquarium Fish Tank Under...

This Angels Aquatics & Pet Supplies Hexagon Aquarium Fish Tank Under...  can work for tanks up to 20 gallons. This under gravel filter system comes with one uplift tube which is responsible for filtering and clearing out dirt and debris from the fish tank. There’s also an airline which you will get when you buy this undergravel filter. The airline is an inch in size and should be connected to the end of the filter plate to stop the water from running back into the air pump. This is one of the best premium undergravel filters because it cleans up the toxic wastes efficiently and also helps you get rid of any harmful chemicals that may be present in the water. However, on the downside, the plastic from which this under gravel filter system is made is very thin and might not support hard gravel substances.


  • Is very stylish and can improve the look of your tank. Spruce up your aquarium!
  • Is perfect for both big (up to 20 gallons) and small tanks.


  • The uplift tube is only one inch in diameter and might not flush bigger debris particle from the water.
  • Made from very thin quality plastic.

Undergravel Filter #5:

Lee's 40/55 Premium Undergravel Filter, 12-Inch by 48-Inch

With this Lee's 40/55 Premium Undergravel Filter, 12-Inch by 48-Inch  you can have convenience and the ability to spruce up your tank and keep it highly maintained and free from harmful substances that may contaminate the water and affect the fish.

Just like the system discussed above, this premium undergravel filter also has an uplift tube that makes sure that the water is circulated properly and in all corners. The carbon cartridges in the filter clean up the bad chemicals that are formed because of pets waste and also make sure that the water doesn’t not smell.

The plates of this undergravel filter are extremely durable and resistant to cracking, which is easily one of its best qualities as this system has a good shelf life. Moreover, the durability means you can also easily place elements like rocks and other various equipment without any fear.

However, for a 55 gallon tank, the bottom isn’t completely filled with purified water and can be a bit troublesome.


  • The air diffusers and carbon cartridges are durable and efficient in making the contents crystal clear.


  • The air stones are small and aren’t suitable for bigger tanks.

Last update on 2021-09-22 at 22:38 Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product. CERTAIN CONTENT THAT APPEARS ON THIS SITE, COMES FROM AMAZON. THIS CONTENT IS PROVIDED ‘AS IS’ AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.

We constantly make an effort to implement our editorial practices and policies through out our site. This entails researching all of our articles exhaustively and always doing our best to offer the most reliable details possible for our audience. Please check out our About Us Page for more info.

This site is backed by readers. When you purchase through site links on our site, we may possibly earn an affiliate commission, at no extra expense to you. Please be sure to enjoy our website!