Long Rimless Glass Aquariums

Extended, versatile long tanks for aquascaping
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The Ultimate Rimless Glass Aquarium Tank

Ultum Nature Systems was the first brand to produce rimless aquariums using ultra high clarity low iron glass with a very unique feature - the 45 degree mitered edge. Unlike traditional rimless aquariums, where all 5 panels of glass are cut with a flat edge then bonded together with clear silicone, the Ultum Nature Systems aquariums take it to the next level.

The mitered edge used by UNS on 4 glass panels allows for a much more seamless joint and requires less silicone to form the corners of an aquarium. This means that not only are the corner edges much cooler to look at, the silicone can be much more precise and cleaned up nicer, which means no globs of leftover dried silicone. A secondary benefit to this is that because the silicone is now angled unlike their flat edged 90 degree counterparts, aquarium maintenance tools such as an algae scraper can clean up against each corner without the worry of accidentally cutting into and degrading the silicone seam overtime, which could lead to potential tank leakage.
Glass Aqua Rimless Glass Aquarium Tank
Ultum Nature Systems UNS Rimless Glass Aquarium Tank

Industry standard 90 degree versus Ultum Nature Systems 45 degree edge
Ultum nature systems UNS Rimless Glass Aquarium Tank
Ultum nature systems UNS Rimless Glass Aquarium Tank

The minimal usage of silicone provides a cleaner look while the holding strength is just as strong as traditional silicone seamed corners.
Ultum Nature Systems UNS Rimless Glass Aquarium Tank
Ultum nature systems UNS 60S Shallow Rimless Glass Aquarium Tank

When viewed at different angles, the corners of Ultum Nature Systems Rimless Aquarium are less distracting.

Long Rimless Aquariums for Aquascaping

Love panoramic aquascapes? Long rimless tanks are a top pick for many styles of aquascaping—including Iwagumi, nature-style, Dutch scapes and biotope aquariums. Their extended profile offers generous space for hardscape design and swimming space for schooling and shoaling freshwater fish like Tetras, Rasboras, Pygmy Cories, Danios and more.
Looking for Aquascaping Inspiration?
Some of our favorite aquascapes were created in the UNS 90L, 20-gallon long tank! Below are two unique layout designs that utilize different hardscape and aquatic plants—each with its own distinct style and beautiful results.