Weight of tank?

[cobb12]

I plan on getting a new 55 gallon sw aquarium with 1.5-2 pounds of live rock in it. I'm not really sure how much that will weigh once i add the water. I just want to be safe but would that amount of weight be safe for the second floor of my house up in my room?

 

[CluelessInNY]

1 gallon = 10 lbs. 550 lbs in water weight alone.

 

[SpeedEuphoria]

1 gallon = 10 lbs. 550 lbs in water weight alone.

Thats not quite right on water weight.

A gallon of water weights ~8+ lbs.

That aside add the LR and sand, ect..

I would use this just for reference then add the LR weight to get close
http://alysta.com/books/fishtank.htm

So ~625lbs + the stand and other equipment weight and Live Rock give or take.

I have no idea if thats safe for your house? I dont think anyone could answer that unless they built it or they can see the construction

 

[lance]

The trick is getting it centered with the cross beams under the floor. This would be scary under any condition but helping distribute the wieght with a think piece of ply wood underneath.