The Fluval Spec iii is a desktop glass aquarium coming in at a mere 2.6 gallon capacity. It boasts an integrated 3-stage filtration chamber with a 40 gal/hour circulation pump with output nozzle.

| Product Name | Fluval Spec III |
| Customer Rating | ![]() |
| Gallons | 2.6 |
| Item Dimensions | 8.7 x 10.8 x 11.8 in |
If your are short on space but love aquariums, consider a nano aquarium such as this.
If you are considering purchasing this nano tank, it’s also important to keep in mind how small this product is. You will be limited to small and few fish. As such, this tank is relatively popular for betta fish enthusiasts, planted tank hobbyists, and cherry shrimp owners.
Fluval Spec Features:
3 Stages Of Filtration:
Mechanical:
Porous foam block that traps large debris. The foam block is easy to clean and reusable.
Chemical:
Activated carbon included. Easy to remove and replace. However, in my opinion, you should consider using Seachem Purigen as it is vastly superior to carbon.
Boyd Chemi‑Pure Blue 11 oz Aquarium Filtration Media Premium Extruded Carbon + Ion‑Exchange Resins in Nylon Bag Clears Toxins, Phosphates & Metals
$22.17 (as of October 23, 2025 18:07 GMT +03:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L]
$65.99 (as of October 23, 2025 18:16 GMT +03:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)Exo Terra Sub Stratum, Bioactive Volcanic Substrate for Reptile Terrariums, Eliminates Odor, Offers Correct Moisture Levels 8.8 lb
$29.98 (as of October 24, 2025 07:09 GMT +03:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)Biological:
BIOMAX inserts create an ideal environment for beneficial bacteria to colonize ensuring the nitrification of fish waste.
The pump also has a flow control tab to decrease output for less current to suit your needs.
The LED light is intended for low light plants only. It’s flexible neck provides added convenience which allows you to adjust the lighting position as you see fit.
PROS:
- Perfect size for your office desktop.
- Glass tank, less prone to scratches.
- Filter is fully-integrated into the back wall, concealed by frosted glass on the sides of the aquarium for pleasant aesthetics.
CONS:
- Lighting is sub-par and you will be limited to low light plants.
- Some customers use foam pads to cover water outlet to decrease flow for betta fish.
- A few customers have noted that the cover has a too big of a round hole (pic below) which your fish may jump out of.







![UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L] #1](https://m.media-amazon.com/images/I/411rag-0N-L._SL100_.jpg)
![UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L] #2](https://m.media-amazon.com/images/I/41d23jD8FfL._SL100_.jpg)
![UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L] #3](https://m.media-amazon.com/images/I/41WpCkdLITL._SL100_.jpg)
![UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L] #4](https://m.media-amazon.com/images/I/41lmvv2awTL._SL100_.jpg)
![UNS Ultra Clear Rimless Tank - 3.4GAL | 13L - 17.71x6.69x6.69 | 45x17x17 CM, 5mm Glass Thickness, Leveling Mat Included - Low Iron, High Clarity Fish Tank w/ 45° Mitered Edge - [45L] #5](https://m.media-amazon.com/images/I/41XsXgcYThL._SL100_.jpg)


