Structural support for 125 gallon aquarium

ddang

New member
I have a century home, and am/was considering getting a 125 gallon aquarium for the dining room, but I'm not sure that the house/intended location of the aquarium can structurally support it.

The location of the the tank would be right next to the dining room wall that separates the dining room from the living room. I'm not sure if it's a loading bearing wall, but when I went down to the basement, I can see studs right below the wall.

The other issue is the tank is rectangular (tank), and the longer dimension of the tank would run parallel to the joists of the floor, and I heard it's better to have length of the tank run perpendicular to the joists to distribute the load across multiple joists as opposed to a single joist.

On top of that, it appears there's some sagging towards this particular wall on the dining room side. On the living room side, it's away from the wall, so I'm not sure what's happening here.

The aquarium itself would be 200 lbs, and 125 gallons of water is a little over 0.5 ton. So I'm probably at somewhere between 1500lbs-2000lbs of load in a concentrated area.

My gut is telling me this is a bad idea but just wanted to get some other opinions? Is there anything I can do to mitigate the issues? There's no where else in the house for a tank of that size, so I'd have to abandon the idea of getting something that large altogether if there's no mitigation.
 
if it’s that old of a house, you’d want to put floor jacks under the joists below where the tank will sit. This will support the joists there and allow your floor to bear the weight of the tank.

My parents did this with an older house back in the 80’s when they set up a 200 gallon FO tank.
 
Hm in your parents case was the length of the tank parallel or perpendicular to the joists? In my case it’s parallel which I’ve read is problematic and all the load of the tank could be concentrated in a single joist
 
Parallel. I guess I should have elaborated. They ran supports across (perpendicular to) the joists and then used floor jacks to support the floor.

This was a house built in the 50’s or 60’s by hand, by the original owners before building codes were enforced.
 
Got it thanks. I may get a structural engineer for peace of mind.

In your parents case is the tank located next to a wall and is it an exterior wall?

The only other place I can put a large tank is in the living room next to an exterior wall. While it’s an exterior wall I don’t think it’s load bearing because the joists are parallel to it. This wall is parallel to the other wall I mentioned in the OP
 
Got it thanks. I may get a structural engineer for peace of mind.

In your parents case is the tank located next to a wall and is it an exterior wall?

The only other place I can put a large tank is in the living room next to an exterior wall. While it’s an exterior wall I don’t think it’s load bearing because the joists are parallel to it. This wall is parallel to the other wall I mentioned in the OP
Definitely get an engineer’s thoughts.

In my parents case, many years ago, when facing the tank, the right side was against a wall that sat over a foundation.
 
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