netDenizen wrote in
:

Nikki wrote:
Netmax..... remember I had told you we were getting a 120 gl
tank? My husband wanted me to ask if you by chance would know the
weight when filled? Is it 3 lbs per gl of water?


It's easier in metric. IIRC, one litre pure water is 1 kilogram
at 25C.

Because a kilo is about 2.1 pounds and a gallon about 4 litres,
then a gallon of water should be around 8-9 pounds. The old
aquarium kid's books long ago said 10 pounds per gallon - just to
be safe.

I used to figure a gallon (US) at 8 pounds 5 ounces. If you add
gravel, plants etc the idea of 10 pounds per gallon is pretty close.


--
Cheers,
Kurt