I had a 90 gallon saltwater aquarium upstairs in my bedroom against a wall for the last 2 years with no problem. Last night I move it to the a 2nd living room which is also upstairs. I'm guessing with water , sand, rocks etc. my tank is about 1200 lbs.
BTW the house is about 8 yrs old if that help.
BTW the house is about 8 yrs old if that help.