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1 US Gallon of water weighs 8.35 lbs. The tank will not be filled to the brim so you can deduct about 0.5 gallons from its maximum capacity. So the weight of the water would be 8.35lbs x 4.50 which is 37.5lbs. You would also have to weigh the tank and other things like lights, cover glass, heater/thermostat, thermometer, filter complete with media, and gravel etc. Everything that you use in the tank must be weighed and added to the water weight to obtain an accurate total weight.

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โˆ™ 2009-10-15 02:13:55
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Q: How much does a 5 gallon fish tank weigh with water?
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