How heavy are these things?

[RDNanoGuy]

Get a piece of 3/4 ply cut to be a few inches larger than the base of the stand and put it between the stand and the carpet. It will spread the load out over a larger area and prevent the tank from leaning. You can paint it the stands color to make it more attractive.

[Scuba Diver Gal]

OK. thanks. Maybe I will call my architect who designed the house, just to be sure. Or maybe it'll be easier to get my son to move into the basement thanks again!

[RDNanoGuy]

Residential building floor are required to support 200 lbs per square foot in Canada.

[toxic111]

Originally Posted by RDNanoGuy

Residential building floor are required to support 200 lbs per square foot in Canada.

Ummm.. no they are not, Commercial floors don't even meet that standard.

Residential floors are 40psf live (anything you put on the floor), and 15-20 dead (weight of the floor itself). Though in most cases a newer home with exceed that standard, depending on the type of joists that are used.

That said, you should be fine, but like others said, need to keep it off carpet, using 3/4" plywood will spread the load over the carpet.

Oh I design buildings for a living, so I have a pretty good idea what I am talking about.

[RDNanoGuy]

Originally Posted by toxic111

Ummm.. no they are not, Commercial floors don't even meet that standard.

Residential floors are 40psf live (anything you put on the floor), and 15-20 dead (weight of the floor itself). Though in most cases a newer home with exceed that standard, depending on the type of joists that are used.

That said, you should be fine, but like others said, need to keep it off carpet, using 3/4" plywood will spread the load over the carpet.

Oh I design buildings for a living, so I have a pretty good idea what I am talking about.

Interesting. I was told that by the builder that built my house. Just goes to show you I guess. Now I'm wondering about my 2500+ tank on the main floor of my house. Good thing I have it on an outside wail where the joists sit on the sill plate.

[Coasting]

Originally Posted by RDNanoGuy

Get a piece of 3/4 ply cut to be a few inches larger than the base of the stand and put it between the stand and the carpet. It will spread the load out over a larger area and prevent the tank from leaning. You can paint it the stands color to make it more attractive.

This.
Don't cut your carpet out
Just ensure the tank is level. I know some people will fill the tank with a few inches of water and then play with it to make sure its level, since waters flat... You can kinda measure the water line from all sides and corners until you're happy with it.
I have a piece of plywood under my stand as well.

Our house is ... 45+ years old, my tanks on the 2nd floor, against a load wall, about 80-90 gallons total system, no issues here.