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Best 20 Gallon Aquarium Hood In 2021 – Top 5 Rated Reviews

Who wants a fish tank they can’t see? Certainly not you! You have to see your fish, plants, or whatever in order to enjoy them. Stop letting your fish spend their days in darkness.

A hood’s going to help you light up your tank while also keeping evaporation down.

If you’ve got a 20-gallon tank, you need the best 20-gallon aquarium hood for it. With the benefit of light and prevention of water loss, there’s no reason NOT to do it.

We’ve lined up some great options for you here. Take a look!

Best 20 Gallon Aquarium Hood

5 Top-Rated 20-Gallon Tank Hoods In 2021 Review

1 Aqueon LED Background Hood

This is a low profile background hood made from black plastic. The Aqueon LED background hood comes in 4 different sizes for 20-gallon tanks: 20”, 24”, 30”, or 36” inches. Within this size range, most 20-gallon rectangular tanks are compatible.

When you order it, you will receive the standard daytime bulb. A separate night time bulb is also available. There is space for installation of a second bulb in the built-in fixture.

On the back, sections are cut out for your tank accessories. Each section is large and spacious, so you have options for filters, heaters, etc.

For feeding and other water adjustments, lift the lid at the front of the hood. The lid rests open, making it easy for you. Closing the lid seals off the tank again for reduced evaporation and heat loss.

A light switch sits on the back right of the hood. The cord also comes out from this part of the hood.


If you just need a simple hood is basic LED viewing lights, this might be a good choice. With varying dimension choices, you’re likely to find your 20-gallon tank dimensions with this hood.

Here’s a closer look at what works and what doesn’t…

Aqueon LED Background Hood
Our rating:4.4 out of 5 stars (4.4 / 5)

  • Creates a lovely flickering effect in the water
  • Large feeding lid
  • Compatible with many 20-gallon tanks
  • Physical light switch is usable with timers
  • Works with some 10 and 30-gallon tanks as well
  • Back cutouts are not customizable at all and are difficult to remove
  • LEDs are too dim for plants, but okay for viewing only

2 Marineland LED Light Hood

Sitting lower on the top, this MarineLand LED light hood has a beautiful low-profile appearance. It rests cleanly on the edges of the tank, creating a better seal for preventing evaporation.

Rather than a clunky light bar, LEDs are set in the middle of the hood. There’s a visible bump. But, it’s round and smooth for a better overall aesthetic.

The LEDs in this hood are built in. They hold on securely to the top of the hood when you open it. If the lights go out or if you want to replace them, remove the light bar and put in a new one.

This comes in 3 different sizes for 20-gallon tanks: 20 x 10, 24 x 12, and 30 x 12 inches. These dimensions are compatible with a range of 20-gallon aquariums, so you’re not limited in your options.

There is space on the back for filters and other accessories in a large cutout. Hinges at the back allow the entire hood to be opened for water maintenance or feeding. There is also a smaller opening for feeding.


The MarineLand LED light hood makes your tank look good. The low-profile design is attractive and modern. It doesn’t sacrifice any of the functionality of a traditional hood, either.

Is it all good news? Let’s see…

Marineland LED Light Hood
Our rating:3.7 out of 5 stars (3.7 / 5)

  • Built-in LEDs work for some low-light freshwater plants
  • Plenty of space for accessories and cords
  • Hood opens up fully for easy access to the water
  • Standard lights have daytime and nighttime modes
  • Removable feeding cover
  • Lights will shine in your eyes when you lift the hood (if left on)
  • Made from thin plastic, may not be durable in the long-term

3 Aqueon Aquarium Black 30” Deluxe Hood

Designed to fit AGA tanks, this hood is also compatible with similarly sized tanks from other brands. The Aqueon aquarium black 30” deluxe hood measures in at 9.7 x 30 x 3.4 inches.

A light rack sits in the middle of the hood. Fluorescent bulbs come with the hood, so you can illuminate your tank right away. The 24-inch T-8 bulb is replaceable.

For feeding and some water adjustments, open up the lid on the front of the hood. The lid spans the entire length of the hood and around half the width, giving you easy access.

On this hood, there are 2 openings in the back section. One is larger than the other, but both are useful for tank accessories and equipment.


If you’re in the market for a simple hood, this is a good choice. It’s not complicated or advanced in any way. This hood does the job without making anything hard for you.

Is simplicity all that matters? Here’s more on this hood…

Aqueon Aquarium Black 30” Deluxe Hood
Our rating:3.6 out of 5 stars (3.6 / 5)

  • Included bulb is good for some aquatic plants
  • Plenty of space for accessories through the back of the hood
  • Compatible with some tanks larger than 20 gallons as well
  • Front lid gives you great access to the water
  • Bright and effective lighting
  • Light has some reliability issues
  • Back cutouts are very difficult to open up
  • Front lid hinges are made from thin plastic that can break over time with use

4 Perfecto Tetra LED Hood

The Perfecto Tetra LED hood is made with sleek, low-profile tanks in mind. Nothing about this hood sticks up awkwardly or stands out of place. There are three sizes available: 16”, 20”, and 24” for tanks of varying sizes.

When sitting on the tank, Tetra’s Perfecto lid appears almost completely flat. The included lights are LEDs which don’t add any height to the center of the hood. There are 5 separate LEDs sitting across the span of the inside.

When opening the hood, you’ll lift up the whole hood. Hinges on the back allow you to easily open it to reach the water inside. A small hole in the front helps you lift the hood out of the lip on the base. It may be used as a small feeding hole as well.

Cutouts on the back give space for filters, heaters, and other accessories. On the inside, all the LEDs are clipped on separately and are replaceable. You can customize this hood to fit your needs more fully.


For fishkeepers who care about form, this hood is a good option. The flat design looks great without compromising on light or light quality.

Here’s what else you need to know…

  • Good for low to medium light plants
  • Lights are bright
  • Attractive low-profile appearance
  • Small feeding hole is convenient
  • Moisture can get into LEDs and ruin them over time
  • Durability may be an issue over time

5 AGA Fluorescent Hexagon Hood

For those with an uncommonly shaped 20-gallon tank, this hexagon hood could be the perfect fit. It’s not meant for square or rectangular tanks but will fit wonderfully on a 20-gallon hexagon aquarium. Each side of the hexagon measures at 9 inches long.

If you have a tank with the right shape, this hood is will fit most of the popular brands available. Regardless of the brand, it will easily slip on top of a 20-gallon tank and provide a great cover and light. Having a hood on top reduces water evaporation from the aquarium.

Raise the front of the hood when it’s feeding time. Attach your necessary tank instruments through the cutouts in the back of the hood. There is enough space for your filter, heater, and other instruments.

A fluorescent light comes in the hood, but the bulbs are replaceable. These lights cast bright white light for viewing, not blue light. It’s great for fish, not for corals.


Not all tanks are rectangular. If you have a uniquely shaped tank like a hexagon, this hood is a great option.

Besides the shape, what else stands out?

AGA Fluorescent Hexagon Hood
Our rating:4.1 out of 5 stars (4.1 / 5)

  • Back sections are perforated, so you’ll only open up the ones you need
  • Sturdy and durable design
  • Compatible with most 20-gallon hexagon tanks
  • Light is removable and replaceable
  • Comes with the bulb included
  • Light is only good for viewing, not for plants or reefs
  • Does not fit all 20-gallon tanks, and is not compatible with most larger tank sizes


Hoods aren’t the most exciting part of the tank, but they’re a necessity. Give your fish some light. You’ll actually enjoy it just as much as they will!

Try the Aqueon LED background hood if you’re looking for something simple. The Perfecto Tetra LED hood is a nice looking low-profile choice, or you could go for the AGA Fluorescent Hexagon Hood if you don’t have a rectangular tank.

What you consider the best 20-gallon aquarium hood may differ from our opinion. So, we’ve left it up to you. Which one do you think would work best for your tank?

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