
Premium rimless aquariums are the latest standard in the world of planted tanks. Experience the highest clarity and true uninterrupted display of a planted, marine or reef aquarium. With fresh and innovative sizes, our dimensions keep the aqua-scaper in mind with additional room for plays on depth and perspective based on the golden ratio. Small or large, the aquascape held inside will come to life with an unparalleled panoramic display of one’s creation.
45° precision cut mitered edges
Low iron and 91% Diamant glass

Cube Rimless Aquarium
Symmetrical cube aquarium tanks are the perfect size for tighter spaces. This style of aquarium is ideal for livestock choices such as Betta fish, Neocaridina shrimp and smaller nano schooling fish species such as Tetras and Rasboras. Beginner or experienced hobbyist, a cube aquarium is a great start or addition to an existing collection of planted tanks.
MODEL VARIANTS: 16C, 20C, 25C, 30C, 40C, 45C, 50C, 60CS
VOLUME RANGE: 1 – 30.9 Gallons

Nano Rimless Aquarium
Increasing in popularity, nano aquarium tanks are the miniature versions of standard sized aquariums. They’re ideal for small displays such as a store countertop, nightstand or console table. With horizontal space, they allow for increased depth perception and creativity as well as swimming room for smaller species of fish and shrimp.
MODEL VARIANTS: 3N, 5N
VOLUME RANGE: 3 – 4 Gallons

Standard Rimless Aquarium
The most common aquarium sizes fall under the standard category. These consist of aquarium tanks ranging in sizes from 10 gallons to 100 gallons and up. These tanks offer a large amount of room for creating larger than life aquascape layouts. Common fauna choices are large schools of nano fish, smaller Cichlids, Gouramis, Angel fish, Discus and other medium sized tank inhabitants. Slightly on the larger size, they are a great canvas for unique nature aquariums.
MODEL VARIANTS: 45U, 60U, 75P, 90P, 90U, 120P, 120M, 120U, 150U, 180U
VOLUME RANGE: 9 – 156 Gallons

Long Rimless Aquarium
Long aquariums provide wide panoramic views and allow for longer aquascape layouts due to the generous amount of horizontal ground provided. Their elongated structure calls for elevated creativity and innovation. Nano schooling fish such as Tetras and Rasboras are ideal as they prefer plenty of horizontal swimming space to explore. Like the others, our long aquariums are clean, sleek and are a unique way to introduce a nature aquarium into any space.
MODEL VARIANTS: 45L, 60L, 90B, 90L
VOLUME RANGE: 3.8 – 21 Gallons

Shallow Rimless Aquarium
These provide a low panoramic view and require some creative aquascaping ideas as they lack general height. They make up for this with the amount of depth available and are overall wonderful canvases for growing aquatic plants emerged or would be excellent for a pond style layout. Lower level aquatic life such as Corydoras pygmaeus or Pygmy Cory Cats make great tank inhabitants as they tend to shoal together on the bottom of the tank and their curious sifting is fun to observe. Clean and sleek, the vibrant colors of the natural world held inside will come to life. No matter how small or big, these low aquarium tanks are the perfect way to introduce a unique nature aquarium into your space.
MODEL VARIANTS: 25S, 5S, 45S, 60S, 75S, 90S, 90SS, 120S, 120SS
VOLUME RANGE: 2 – 68 Gallons

Tall Rimless Aquarium
This aquarium category provides increased height, making them perfect for aquascapes that utilize creative verticality. The smaller models are ideal for a minimalistic approach to specimen display. This category highlights intricate details and encourages elevated ideas and techniques.
MODEL VARIANTS: 16T, 25T, 30T, 3T, 5T, 45T, 60T
VOLUME RANGE: 1.5 – 24.3 Gallons
LIMITED EDITION BLUE
The Ultum Nature Systems Limited Edition Rimless Glass Aquarium features a refined frosted blue background with a soft-touch satin finish, creating a sleek and modern aesthetic while enhancing depth and visual appeal. Its heat-fused white bottom is engineered for durability with a peel-resistant painted finish, delivering both long-lasting performance and a clean, minimalist presentation that complements contemporary aquascaping designs.
MODEL VARIANTS: 5N, 45U, 60U, 90L
VOLUME RANGE: 4.6 – 21.3 Gallons


ULTUM NATURE SYSTEMS TANK SIZE GUIDE
| TYPE | MODEL | DIMENSIONS | GLASS THICKNESS (MM) | VOLUME |
STANDARD | 45U |
45x28x28 cm 17.71x11.02x11.02 in | 5 |
35.2L 9.3GAL |
| 60U |
60x36x36 cm 23.62x14.17x14.17 in | 6 |
77.7L 20.5GAL | |
| 75P |
75x45x45 cm 29.52x17.71x17.71 in | 8 |
151.8L 40.1GAL | |
| 90P |
90x45x45 cm 35.43x17.71x17.71 in | 10 |
182.2L 48.1GAL | |
| 90U |
90x56x56 cm 35.43x22.04x22.04 in | 10 |
282.2L 74.5GAL | |
| 120P |
120x50x50 cm 47.24x19.68x19.68 in | 12 |
300L 79.2GAL | |
| 120M |
120x60x45 cm 47.24x23.62x17.71 in | 12 |
324L 85.5GAL | |
| 120U |
120x60x60 cm 47.24x23.62x23.62 in | 12 |
432L 114.1GAL | |
| 150U |
150x60x60 cm 59.05x23.62x23.62 in | 15 |
540L 142.6GAL | |
| 180U |
180x60x60 cm 70.86x23.62x23.62 in | 15 |
648L 171.1GAL | |
CUBE | 16C |
16x16x16 cm 6.29x6.29x6.29 in | 5 |
4L 1GAL |
| 20C |
20x20x20 cm 7.87x7.87x7.87 in | 5 |
8L 2.1GAL | |
| 25C |
25x25x25 cm 9.84x9.84x9.84 in | 5 |
15.6L 4.1GAL | |
| 30C |
30x30x30 cm 11.81x11.81x11.81 in | 5 |
27L 7.1GAl | |
| 40C |
40x40x40 cm 15.74x15.74x15.74 in | 6 |
64L 16.9GAL | |
| 45C |
45x45x45 cm 17.71x17.71x17.71 in | 6 |
91.1L 24GAL | |
| 50C |
50x50x50 cm 19.68x19.68x19.68 in | 8 |
125L 33GAL | |
| 60C |
60x60x60 cm 23.62x23.62x23.62 in | 10 |
216L 57GAL | |
NANO | 3N |
31x19x19 cm 12.2x7.48x7.48 in | 5 |
11.1L 2.9GAL |
| 5N |
36x22x22 cm 14.17x8.66x8.66 in | 5 |
17.4L 4.6GAL | |
LONG | 45L |
45x17x17 cm 17.71x6.69x6.69 in | 5 |
13.0L 3.4GAL |
| 60L |
60x20x20 cm 23.62x7.87x7.87 in | 5 |
24.0L 6.3GAL | |
| 90B |
90x20x25 cm 35.43x7.87x9.84 in | 6 |
45.0L 11.8GAL | |
| 90L |
90x30x30 cm 35.43x11.81x11.81 in | 8 |
81.0L 21.3GAL | |
SHALLOW | 16S |
16x16x8 cm 6.29x6.29x3.14 in | 5 |
2.0L 0.5GAL |
| 5S |
36x22x12 cm 14.17x8.66x4.72 in | 5 |
9.5L 2.5GAL | |
| 25S |
25x25x13 cm 9.84x9.84x5.11 in | 5 |
8.1L 2.1GAL | |
| 45S |
45x28x18 cm 17.71x11.02x7.08 in | 5 |
22.6L 5.9GAL | |
| 60S |
60x36x18 cm 23.62x14.17x7.08 in | 5 |
38.8L 10.2GAL | |
| 75S |
75x45x30 cm 29.52x17.71x11.81 in | 8 |
101.2L 26.7GAL | |
| 90S |
90x56x36 cm 35.43x22.04x14.17 in | 10 |
181.4L 47.9GAL | |
| 90SS |
90x56x25 cm 35.43x22.04x9.84 in | 10 |
126L 33.2GAL | |
| 120S |
120x60x36 cm 47.24x23.62x14.17 in | 12 |
259L 68.4GAL | |
| 120SS |
120x60x25 cm 47.24x23.62x9.84 in | 12 |
180L 47.5GAL | |
| 60CS |
60x60x30 cm 23.62x23.62x11.81 in | 8 |
108L 28.5GAL | |
TALL | 16T |
16x16x24 cm 6.29x6.29x9.44 in | 5 |
6.1L 1.6GAL |
| 20T |
20x20x30 cm 7.87x7.87x11.81 in | 5 |
12L 3.1GAL | |
| 3T |
31x19x24 cm 12.20x7.48x9.44 in | 5 |
14.1L 3.7GAL | |
| 5T |
36x22x28 cm 14.17x8.66x11.02 in | 5 |
22.1L 5.8GAL | |
| 25T |
25x25x36 cm 9.84x9.84x14.17 in | 5 |
22.5L 5.9GAL | |
| 30T |
30x30x45 cm 11.81x11.81x17.71 in | 5 |
40.5L 10.6GAL | |
| 45T |
45x28x36 cm 17.71x11.02x14.17 in | 5 |
45.3L 11.9GAL | |
| 60T |
60x36x45 cm 23.62x14.17x17.71 in | 6 |
97.2L 25.6GAL |
Ultum Nature Systems Glass Lids and Clear Clips
Glass lids are the perfect addition to your Ultum Nature Systems rimless glass aquarium tank. They are great for minimizing water evaporation and keeping even the most skittish fish, safe – all without compromising the clean aesthetic of a rimless planted tank. Crafted with precision, they fit any UNS tank while ensuring proper room for essential equipment.
NOTE: At this time, Ultum Nature Systems does not produce lids to fit 75P, 90P, 90U, 120U, 150U, and 180U tank sizes.

STANDARD
CUBE
NANO
LONG
SHALLOW
TALL

Aquascaping a UNS 90SS Shallow Aquarium