Aquariums have tempered glass at the bottom. Tempering makes the bottom glass sturdy. This helps it to withstand the weight of the water inside the tank. The base glass also needs to be strong to hold the substrate and rocks.

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For example, the basic 55-gallon aquarium is 4-foot-by-15-inches, which is an average size that most hobbyists are familiar with. This tank is normally constructed of 1/4-inch-thick (six millimeters) glass.

75 Gallon Aquarium Dimensions The typical size of a 75 gallon aquarium is 48″ x 18″ x 24″. However, this can vary slightly from tank to tank. A tank of this size will weigh a lot more than smaller tanks, especially when filled. Expect your tank to be around 140lbs when empty and 850lbs when filled.

Extra Large Tank Size

However, at larger sizes this can create more of a problem. A 500-gallon acrylic tank weighs about 600 pounds and needs 5 people to lift, while a 500-gallon glass tank weighs about 1,050 pounds and requires 8 people.

Glass tank: For the sides you are looking at least 1.125″ thick (no thinner). The bottom will need to be thicker ~1.75″. This is for a fully “framed” tank, with a safety factor of 3.8, higher is better.

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