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Aquarium Weights & Sizes

Below are some rough guidelines as to what to expect when looking at aquariums and empty vs full weight.  The weights are an estimate because the amount of rock, thickness of glass and type of water all effect the weight calculations.  A gallon of freshwater at a specific gravity of 1.000 weighs 8.34lbs.  1 gallon of water 8.34lbs times the specific gravity of say 1.025 equals 8.5485lbs (8.43 x 1.025 = 8.5485) The weight of the water will increase directly proportionate to the weight of the salt being dissolved in the water.  1 gallon of saltwater at 1.025 equals 8.54 lbs.

SMALL AQUARIUMS
Tank Size L x W x H Empty Weight Filled Weight
2 1/2 gallon 12" x 6" x 8" 3 lbs 27 lbs
5 gallon 16" x 8" x 10" 7 lbs 62 lbs
10 gallon "Leader" 20" x 10" x 12" 11 lbs 111 lbs
15 gallon 24" x 12" x 12" 21 lbs 170 lbs
15 gallon High 20" x 10" x 18" 22 lbs 170 lbs

MID-SIZED AQUARIUMS
Tank Size L x W x H Empty Weight Filled Weight
20 gallon High 24" x 12" x 16" 25 lbs 225 lbs
20 gallon Long 30" x 12" x 12" 25 lbs 225 lbs
25 gallon 24" x 12" x 20" 32 lbs 282 lbs
29 gallon 30" x 12" x 18" 40 lbs 330 lbs
30 gallon Breeder 36" x 18" x 12" 48 lbs 348 lbs
40 gallon Breeder 36" x 18" x 16" 58 lbs 458 lbs
40 gallon Long 48" x 12" x 16" 55 lbs 455 lbs

LARGE AQUARIUMS
Tank Size L x W x H Empty Weight Filled Weight
50 gallon 36" x 18" x 19" 100 lbs 600 lbs
55 gallon 48" x 13" x 21" 78 lbs 625 lbs
65 gallon 36" x 18" x 24" 126 lbs 772 lbs
75 gallon 48" x 18" x 21" 140 lbs 850 lbs
90 gallon 48" x 18" x 24" 160 lbs 1050 lbs
125 gallon 72" x 18" x 21" 206 lbs 1206 lbs
150 gallon 72" x 18" x 28" 338 lbs 1838 lbs
180 Gallon 72" x 24" x 25" 430 lbs 1870 lbs
225 Gallon 72" x 27.5" x 27.5" 358 lbs 2158 lbs