Compare weight factor: acrylic vs. glass
Compare other factors: acrylic tank vs. glass tank vs. Aqua Vim seamless curved glass tank
The glass we use for our tanks is specially made to surpass our competitors, therefore is clearer than glass used by most other manufacturers. We can also custom-make using Starphire, or Ultra-clear glass to meet your perfectionism. See the difference below:
Shown above: Side views of three 1/2" thick panes of each of the three glass grades for comparison. The three dark green pieces in the middle are the standard glass used by most other aquarium manufacturers, the three pieces on the right are the standard glass used by Aqua Vim®; and the three pieces on the left are low-iron Starphire/UltraClear glass, which are not as tough as Aqua Vim glass, but the clearest.
Aqua Vim® uses either Aqua Vim glass in its standard tanks for most customers, or UltraClear glass for extreme hobbyists. Since it is difficult to bent low-iron UltraClear glass even in a digitally-controlled thermal oven, a tank built using curved UltraClear glass is usually about 3 times more expensive than a tank built using curved Aqua Vim glass.
* All weights, sizes, and other information provided above are based on approximate estimates of materials generally used in manufacturing of aquariums available on the market. Weights of aquariums may vary from one manufacturer to the other.