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Ultum Nature Systems Ultra Clear Rimless Aquarium - Low Iron Glass Fish Tank with 45° Mitered Edges, 5mm-12mm Thick, Leveling Mat Included (3N, Nano, 3 Gallon)

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Availability: In Stock.
Fulfilled by SubstrateSource

Arrives Thursday, Jun 11
Order within 8 hours and 51 minutes
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Pattern Name: Nano


Size: [3N] - 3 Gal - 12.2 x 7.48 x 7.48 in


Features

  • Crafted with low iron 91% clarity glass and 45-degree corners The glass appears clearer with a minimal greenish or blue tint with uninterrupted edges, providing a more true-to-life representation of your aquatic environment.
  • Constructed with German made silicone Bonded together using high quality adhesive rated for moisture and durability, our tanks give peace-of-mind for even the most dedicated aquarium enthusiasts.
  • Leveling mat included Leveling mats add a non-slip surface to the base of your tank and are a necessity for adding support and stability for keeping your tank safe and secure from shifting or slipping.
  • 3N - 12.2" x 7.48" x 7.48"

Description

These rimless aquariums are carefully crafted using 91% clarity diamante glass, a highly transparent extra clear glass with very little residual green color. The low iron content in the glass provides uninterrupted crystal clear visibility. The 45° mitered edges are bonded together using high performance German silicone specifically designed for aquarium construction. Rather than following the conventional sizing of other rimless aquarium brands, our dimensions keep the aqua caper in mind by focusing on the golden ratio. The additional space makes it easier to achieve that sense of perspective and truly show depth in an aqua cape. Each ultra clear tank comes with a black leveling mat which is crucial so you don't have to cut up your wife's yoga mat.

Brand: Ultum Nature Systems


Material: Glass


Tank Volume: 3 Gallons


Special Feature: Easy to Clean, Rimless


Product Dimensions: 12.2"L x 7.48"W x 7.48"H


Shape: Rectangular prism


Specific Uses For Product: Indoor


Style: Modern


Color: Nano


Included Components: Black Dense Foam Leveling Mat


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 12.2 x 7.48 x 7.48 inches; 5 Pounds


Item model number ‏ : ‎ 3N


Date First Available ‏ : ‎ September 29, 2016


Manufacturer ‏ : ‎ Ultum Nature Systems


Best Sellers Rank: #37,655 in Pet Supplies (See Top 100 in Pet Supplies) #48 in Aquariums


#48 in Aquariums:


Customer Reviews: 4.7 4.7 out of 5 stars (347)


Brand Name: Ultum Nature Systems


Included Components: Black Dense Foam Leveling Mat


Model Number: 3N


UPC: 863741000315


Global Trade Identification Number: 15


Manufacturer: Ultum Nature Systems


Manufacturer Part Number: 3N


Unit Count: 1.0 Count


Additional Features: Easy to Clean, Rimless


Specific Uses For Product: Indoor


Tank Volume: 3 Gallons


Item Dimensions L x W x H: 12.2"L x 7.48"W x 7.48"H


Item Shape: Rectangular prism


Product Style: Modern


Color: Nano


Material Type: Glass


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 11

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


  • looks great
i think a large part about aquarium review is longevity, which i cant review yet. but for the tank itself, it is very nice. the glass is clear. the whole thing looks very clean. its a nice tank and worth the premium imo.
Reviewed in the United States on December 7, 2025 by j

  • Beautiful tank!
Pattern Name: Nano Size: [3N] - 3 Gal - 12.2 x 7.48 x 7.48 in
I got the 3 gallon nano tank for my shrimp. This is a beautiful tank and the quality is excellent. It showed up well packaged and on time. I’ve wanted this tank for a long time and it did not disappoint. UNS is worth the extra money. I got the UNS glass lid with clips and it’s perfect 😍
Reviewed in the United States on February 14, 2026 by Jessica Flynn

  • Amazing tank
Amazing tank! Perfect size, so clear it seems like the fish are floating and such a great design. I love this tank!
Reviewed in the United States on December 16, 2025 by Miguel A. Nieves-Maldonado

  • Solid clean looking and perfect shrimp tank
Pattern Name: Nano Size: [3N] - 3 Gal - 12.2 x 7.48 x 7.48 in
Perfect shrimp tank. Good quality. Looks clean and nice
Reviewed in the United States on January 29, 2026 by mauro

  • Makes for a beautiful terrarium water area.
Pattern Name: Shallow Size: [5S] - 2.5 Gal - 14.17 x 8.66 x 4.72 in
I got this 2.5g as a water area for my zoo med 25g reptihabitat, and made a DIY waterfall going into it, and it's just perfect. It has a very, very sturdy construction - I messed up my first attempt at the expansion foam waterfall, and the foam expanded too much and pushed this aquarium into the front panel of the terrarium, breaking the panel, and the aquarium didn't even have a scratch. ... show more
Reviewed in the United States on January 6, 2026 by Ashton

  • Excellent – perfect for my betta fish
Pattern Name: Nano Size: [3N] - 3 Gal - 12.2 x 7.48 x 7.48 in
Excellent product. It works perfectly and is ideal for my betta fish. The size and design are just right, and it performs exactly as described. Very easy to use and great quality overall. I’m very satisfied with this purchase and would definitely recommend it for betta fish.
Reviewed in the United States on January 19, 2026 by Frank

  • High build quality
Pattern Name: Long Size: [45L] - 3.4 Gal - 17.71 x 6.69 x 6.69 in
Great build quality, the corners are very well done so is the silicone caulking. The glass is very clear. It comes with a nice self leveling mat.
Reviewed in the United States on January 16, 2026 by Amazon Customer

  • Beautiful looking tank and great customer service
Pattern Name: Standard Size: [60U] - 20.5 Gal - 23.62 x 14.17 x 14.17 in
The fish tank was unfortunately damaged when it was delivered. I contacted the company and they immediately send me a replacement tank. I appreciate their customer service and prompt responses to my queries. The replacement tank arrived after a few days and looks beautiful after it's set up.
Reviewed in the United States on February 27, 2026 by Frank

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