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Allcolor

Allcolor Low Iron Glass Ultra Clear Rimless Aquarium Tank (21Gal) | Artisan Grade Fish Tank for Professional Aquascaping and Planted Layouts, 6-60 Gallons (21Gal - Top Glass Canopy)

  • Based on 358 reviews
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Availability: In Stock.
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Arrives Sunday, Aug 23
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Size: 21Gal 23.6"L×13.7"W×14.9"H


Features

  • PREMIUM LOW-IRON GLASS - Features ultra-clear, low-iron glass and a sleek rimless design. It provides an unobstructed view and true-to-life color representation, making your aquascaping and freshwater plants look vibrant and naturally beautiful without any distracting green tint.
  • SEAMLESS JOINTS & STRUCTURAL INTEGRITY - The quality of a premium rimless aquarium depends entirely on professional assembly. Each tank is individually bonded and detailed by experienced specialists. This meticulous manual process ensures exceptionally thin, uniform, and near-invisible silicone joints that provide reliable structural integrity.
  • ADVANCED ENGINEERED BONDING - To complement the skill of our specialists, we utilize top-tier German silicone engineered for exceptional tensile strength and anti-aging durability. This professional-grade sealing ensures optimal stress distribution across all glass panels, delivering a highly secure and dependable setup for long-term home or office display.
  • MINIMALIST POLISHED FINISH - Every glass edge undergoes a rigorous multi-step polishing process to achieve ultra-smooth, scratch-resistant beveled finishes. This meticulous attention to detail prevents cuts during intricate aquascaping and routine trimming, while enhancing the minimalist, water-suspension aesthetic.
  • PRODUCT SPECIFICATIONS - Size:23.62 x 13.78 x 14.96 inches (60 x 35 x 38 cm).Thickness:6mm.Capacity: 21 Gallons. Includes: One set of matching top glass canopy with clips and a protective bottom cushioning mat. Due to the fragile nature of large glassware, we provide reinforced packaging. If you have any questions or issues upon arrival, our customer care team is always ready to assist you.

Description

We pursue perfect products. During the production process, five pieces of high-quality low-iron glass have to go through more than ten procedures before they are turned into a rimless aquarium, and then go through at least three more quality control procedures before they are finally sold as qualified products. You'll find nothing less than perfection, from the grinding and polishing of the glass edges to the fine detailing of the glue joints.

Brand: Allcolor


Material: Exhibition grade low iron glass


Tank Volume: 21 gallons


Special Feature: Rimless


Product Dimensions: 23.62"L x 13.78"W x 14.96"H


Item Weight: 22.54 kg


Shape: Rectangular


Specific Uses For Product: Indoor


Style: Rimless 90 degrees Right Angle


Color: Clear


Product Dimensions ‏ : ‎ 23.62 x 13.78 x 14.96 inches; 49.7 pounds


Item model number ‏ : ‎ Rimless


Date First Available ‏ : ‎ June 4, 2021


Manufacturer ‏ : ‎ Allcolor


Best Sellers Rank: #38,768 in Pet Supplies (See Top 100 in Pet Supplies) #46 in Aquariums


#46 in Aquariums:


Customer Reviews: 4.2 4.2 out of 5 stars (358)


Brand Name: Allcolor


Included Components: Lid


Model Number: Rimless


Number of Items: 1


Manufacturer: Allcolor


Unit Count: 1 Count


Manufacturer Part Number: Rimless


Material Type: Exhibition grade low iron glass


Additional Features: Rimless


Specific Uses For Product: Indoor


Vivarium Type: Aquarium


Pet Type: Fish


Target Species: Fish, aquatic plants, ornamental shrimp


Tank Volume: 21 gallons


Item Dimensions L x W x H: 23.62"L x 13.78"W x 14.96"H


Item Weight: 22.54 kg


Item Shape: Rectangular


Product Style: Rimless 90 degrees Right Angle


Color: Clear


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 23

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

    • favorite tank of all time
Size: 6Gal 14.1" L × 10.2" W × 10.2" H
My most beautiful tank. Unfortunately my fish outgrew it, but it is so gorgeous, it's the perfect size and I received so many compliments on the rimless design.
Reviewed in the United States on July 15, 2026 by Sheela
    • Great quality - beautiful tank
Size: 34Gal 35.4"L×15.7"W×15.7"H
Review Image by Carla S & Michael F Schildgen
Beautiful tank. Arrived quickly and well crated. I’ll post pics when the aquascaping is complete.
Reviewed in the United States on July 28, 2026 by Carla S & Michael F Schildgen
    • Beautiful Tank!!
Size: 10Gal 18.8"L×11"W×11.8"H
Review Image by Kierstynn Bailey
Review Image by Kierstynn Bailey
This is a BEAUTIFUL tank! And it’s my first tank! I gotten my betta fish in here and he’s doing great as what I have seen! I think personally it’s worth the price but unfortunately, the lid that came with it was broken. (I think that may have been my fault from removing the tank from box. :,D) But the lid was a bit too narrow for my liking. And personally not a fan of the plastic on one side of the lid that it came with. But the tank is easy for me to set up for the aquascaping! (Only gave it a four stars cuz of the broken lid and the size of lid is not to my liking. Which is personally is not a big deal to me as I can get alternative lid options and I’m already clumsy enough and scared to drop the glass lid. D,: Regardless, the tank is beautiful! ... show more
Reviewed in the United States on October 1, 2025 by Kierstynn Bailey
    • Beautiful!
Size: 21Gal 23.6"L×13.7"W×14.9"H
The clarity is absolutely worth the money and being rimless makes a huge difference. It comes packed really well, so I can’t imagine it arriving damaged. No leaks, and seems every bit as sturdy as rimmed aquariums. I’ve seen complaints that low-iron glass scratches more easily. I think that might be slightly true, but I think it’s mostly just that the clarity makes scratches more obvious. Haven’t had any problems with the magnetic glass scrubber, but the plastic brackets the lid rests on have left scratches. ... show more
Reviewed in the United States on March 25, 2026 by Festhaus
    • UPDATE: LEAK AFTER ONE DAY: Did not come with leveling mat
Size: 21Gal 23.6"L×13.7"W×14.9"H
Review Image by Logan Walker
Review Image by Logan Walker
Review Image by Logan Walker
Review Image by Logan Walker
Review Image by Logan Walker
CRUCIAL UPDATE: After a short 48 hours I walked past the tank and identified a pool of water. It is leaking from the back side panel connection. BE AWARE 21 gallon version! $200 for a leaking tank that was beautiful for a short time. I really like this tank size. It is super heavy and sturdy. My lid did not come broken and I truthfully love the style because it has room for my plants to grow out of it. The cleaning cloth is nice, it’s a big size and gets the glass squeaky clean. All that said my tank (21 gallon) did not appear to come with an actual mat. At first I was confused because there was a white fabric that sort of fit the tank but was short. I went back to the description and saw the mat that’s included (according to the picture) is black but I don’t have any black neoprene mat with my tank which is majorly upsetting because I need a mat since this is a rimless tank. So now I have to order a mat that fits the tank but overall the tank itself is gorgeous so far. ... show more
Reviewed in the United States on November 26, 2025 by Logan Walker
    • Shattered!
Size: 34Gal 35.4"L×15.7"W×15.7"H
Review Image by Amazon Customer
Review Image by Amazon Customer
UPDATE.... Amazon gladly replaced the aquarium. The glass is so thick. Tank is gorgeous, I love it! The packaging was the same cheap way as the first one, but somehow made it undamaged. Would have been beautiful! Was not even close to being properly protected especially the bottom which has nothing. The glass is/was gorgeous and very thick. The corners and seams are beautiful as well. Idk if I should go through the wait again if the packaging will be the same. ... show more
Reviewed in the United States on June 6, 2026 by Amazon Customer
    • Outstanding first impressions review
Size: 21Gal 23.6"L×13.7"W×14.9"H
I ordered this to start a saltwater macroalgae/refugium display tank that will be plumbed inline with a 50 gal mixed reef tank. I just received the tank yesterday via Amazon shipping. And the tank arrived well packed inside a foam cushioned panel wood shipping crate that was inside a heavy cardboard outer box for added protection. So far the tank with it's included glass lid, looks amazing and all pieces arrived in perfect condition. I'll be updating as I go through closer inspections and water leak testing. But outstanding all around first impressions thus far. Thanks Amazon delivery service team for going above and beyond on this order. Edit: I was able to safely drill an overflow drain hole for my Eshopps with the included diamond hole saw with no issues. So anyone wondering it is not using tempered glass and it can be drilled. I did check beforehand using the polarized sunglasses trick with the lcd screen of my cellphone. ;p Outstanding quality tank! ... show more
Reviewed in the United States on October 17, 2025 by Brent
    • High quality glass, get your own foam pad
Size: 6Gal 14.1" L × 10.2" W × 10.2" H
Review Image by Kevin Pritchett
6 gallon. So far about 4 months no issue, bought my own foam pad for it as the one they supply is very thin. Glass is super clear with a very slight blue tint. Good quality, no blemishes I’ve spotted yet. Currently a pea puffer tank after I used it for a QT tank
Reviewed in the United States on April 20, 2026 by Kevin Pritchett

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