hello. I have a 50 gallon breeder tank, 36x18x18, that I had a coffee table built to go around it. Now I know these size tanks can get very heavy, around 500 pounds, but I was wondering if anyone knows if this would be safe in a second floor apartment complex that was built I believe within the last 15 years or so. The tank would not be sitting directly on the floor. It would be sitting about maybe an 1 1/2 off the floor. Any help would be greatly appreciated, and if you have any questions please ask.