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10 Best 5-Gallon Rimless Aquariums – Reviews & Top Picks

More and more people are choosing to keep their small fish, invertebrates and live plants in a nano aquarium.

Rimless aquariums offer everything aquarists want in a small tank, including a simple and streamlined look, which is a big selling point.

Small borderless aquariums are the perfect addition to small spaces where larger or bulkier aquariums won't fit, such as desks, side tables, and small cabinets.

Several types of fish and small invertebrates can thrive in micro rimless aquariums and you can use them to create a stunning aquarium masterpiece.

BestForPets (bestforpets.org) researched some of the best 5-gallon rimless aquariums that can be converted into adorable micro aquariums.

How to Choose the Finest 5-Gallon Rimless Aquarium (Buyer's Guide)

Briefly Describe a Nano Aquarium.

It is often agreed that aquariums with a capacity of less than 30 gallons are micro aquariums. Nano fish, insects, and plants may all find a comfortable home in these little aquariums.

Nano aquariums are advantageous since they don’t require a lot of room and can be placed in almost any setting, from homes to workplaces. A nano aquarium won’t take up much space in a room, and it will fit nicely on an aquarium stand or similar piece of furniture.

Nano aquariums may be either freshwater or saltwater environments, and they can house a wide range of little residents, rocks, forests, and plants to create stunning aquascapes.

Why Go for a Tank Top Without Rims

Rimless or frameless aquariums have a more contemporary, minimalist, and elegant appearance. Low-iron glass is often used because it is both inexpensive and highly transparent, allowing for a better view of the aquarium’s interior.

Standard glass aquariums have a greenish tint to them, however rimless tanks don’t seem to have this tint and have a cleaner appearance.


There are two 5-gallon rimless aquariums that really stood out to us during our research, and BestForPets (bestforpets.org) ticked them off on our list of best 5-gallon rimless aquariums.

The Penn-Plax Water-World Vertex Desktop Aquarium Kit is a great choice for those who want to get started with a borderless tank as it has a small tank with lots of accessories.

The Allcolor super transparent borderless aquarium comes in second thanks to its low price and high-grade transparent glass construction.


Best All-Around: Penn-Plax Desktop Aquarium Set

  • Material: Glass
  • Shape: Square
  • Five inches long by nine and a half inches wide by twelve inches high
  • Fishing net, thermometer, filter, and lid are all included.

With the Penn-Plax Water-World Vertex Desktop Aquarium Kit, you not only receive a transparent and frameless nano aquarium, but also a variety of useful things to get your aquarium up and running.

For a completely clear view of your aquarium, it is made of 1/8-inch thick bent glass with rounded edges. Due to its nanoscale size, it is ideal for use on desktops and other compact work surfaces. Most of the equipment necessary to set up an aquarium is included in this package.

A full-range digital thermometer, a fish net, and a Cascade 20 power hang-on-back filter are all included in the package.


  • Including the tank and other stuff.
  • There are no obstructions to the view within the aquarium.
  • Super for newbies


  • Expensive


Best Price on Allcolor’s Ultra Clear Rimless Tank

  • Glass with a low iron content
  • Shape: Rectangle
  • A size of 2 by 10.2 by 10.2 inches
  • Including: German adhesive

The Allcolor Ultra Clear Rimless Aquarium Tank is the finest 5-gallon aquarium for the money since it is both inexpensive and manufactured from high-quality, low-iron glass.

Since it contains less iron, low-iron glass allows more light through. When compared to standard aquarium glass, this method produces a striking improvement in clarity. Professional German adhesive is used to assemble the low iron glass panels, and it does not leach dangerous chemicals into the water over time.

The minimalist form of this tank, without any visible frames, allows you an unobstructed view of your aquarium’s interior. Before processing the tank for export, Allcolor does a comprehensive inspection to make sure there are no problems.


  • Open sightline
  • Low-iron glass of the highest quality
  • Affordable


  • Clearly advertises its name brand on the street corner


The Rimless Aquarium from HIRO Aquatics is the Best Option

  • Glass with a low iron content
  • Shape: Rectangular
  • Size: 8″ x 9.8″ x 11.8″
  • White mat with built-in leveler.

The HIRO Aquatics Nano Tall Rimless Aquarium is our top pick because it is sleek, functional, and easy to maintain. As it is composed of low-iron glass, the aquarium’s inhabitants will be vividly displayed to you.

Therefore, the tank may be seen through more clearly than in a standard glass tank. Its vertical form factor allows it to find a home on even the tiniest of workstations.

As there is no branding on the glass, you get a completely see-through aquarium ideal for nano fish. The white mat included may be placed under the aquarium to level it and relieve stress on the glass.


  • Affordable
  • High-quality
  • Effects graphics that are easy to understand
  • Created to minimize the use of available room


  • Provides more ceiling height than square footage


Rimless Aquarium from Ultum Nature Systems

  • Low-iron glass, the material
  • Shape: Square
  • Product dimensions are 17 by 8.66 by 17.14 inches.
  • Components made from German silicone

The low iron glass in this Ultum Nature Systems Rimless Aquarium Fish Tank is 91 percent transparent, making it easy to see the contents of your aquarium.

German high-performance aquarium silicone was used to seal the 45-degree mitered corners. A flat, black mat is included with each aquarium tank for just such an occasion. This aquarium tank’s exceptional transparency makes it easier to view your aquatic inhabitants than with regular glass.

Because of its construction using the golden ratio developed by the firm, this aquarium provides a more realistic sense of depth and perspective than standard tanks.


  • Low-iron Diamant glass
  • The clarity of the scene is astounding.
  • Sealed with German silicone


  • Engraved company logo on the front face


LANDEN Low-Iron Rimless Tank

  • Low-iron glass, the material
  • Shape: Rectangle
  • Measurements: 8.7 x 10.2 x 2 inches
  • Including a black foam pad for even surfaces.

The LANDEN 36P 5 Gallon Rimless Low Iron Aquarium Tank has thick, low-iron glass that is 5mm in width and transmits 91% of visible light.

There is no surrounding frame, giving you an unobstructed view of your aquarium’s inhabitants. It was made to exacting specifications, so you won’t find any jagged edges or poorly attached panels here. A black nanofoam pad for leveling is included.

The logo on this rimless tank’s glass front panel is adhered using plastic tape, which may leave a glue residue if removed.


  • Transparency at 91%
  • No rough spots
  • Created with only the finest components


  • Has a plastic logo on the front

Author Image

Dr. Barry Buttler

Dr. Barry Buttler, DVM, MS, DACVIM, is an experienced veterinarian who specializes in the care of small animals, specifically dogs. Dr. Barry K. Buttler is a member of the American Veterinary Medical Association and holds multiple certifications in small animal emergency medicine and geriatric pet health.

Veterinarian (DVM) Dr. Barry Buttler


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